# LinkedIn ad specs and sizes for every format, checked against LinkedIn

1 table for 13 formats and Lead Gen Forms, the 12 places LinkedIn's own pages disagree, a character counter and blank size templates.

*By Stan Rymkiewicz, maintainer of adwarp. Updated November 7, 2026.*

LinkedIn's recommended single image ad size is 1200 x 628 pixels (1.91:1), with 1200 x 1200 for square and 720 x 900 for vertical, and carousel cards are 1080 x 1080. Intro text shows 150 characters before it cuts off and headlines show 70, and every number below was checked against LinkedIn's own spec pages on November 7, 2026.

## LinkedIn ad specs for every format

1 row per format, plus Lead Gen Forms. "Shown" is where the feed truncates text and "max" is the most a field accepts. Each format name links to the LinkedIn page its numbers come from.

| Format | Ratios | Recommended pixels | Files and maximum size | Intro text, shown / max | Headline, shown / max | Call to action |
| --- | --- | --- | --- | --- | --- | --- |
| [Single image](https://www.linkedin.com/help/lms/answer/a426534) | 1.91:1, 1:1, 4:5 | 1200 x 628, 1200 x 1200, 720 x 900 | JPG, PNG or GIF, 5 MB | 150 / 3,000 | 70 / 200 | 10 labels |
| [Video](https://www.linkedin.com/help/lms/answer/a424737) | 16:9, 1:1, 4:5, 9:16 | 1920 x 1080, 720 x 900, 720 x 1280 | MP4, 75 KB to 500 MB | 150 / 3,000 | 70 / 200 | 10 labels |
| [Carousel](https://www.linkedin.com/help/lms/answer/a427022) | 1:1 | 1080 x 1080 a card | JPG, PNG or static GIF, 10 MB a card | 150 / 255 | 45 a card | Lead Gen Form only |
| [Document](https://www.linkedin.com/help/lms/answer/a493903) | Vertical, horizontal, square | Not given | PDF, DOC, DOCX, PPT, PPTX, 100 MB | 150 / 3,000 | 70 / 200 | Not listed |
| [Event](https://business.linkedin.com/advertise/ads/sponsored-content/event-ads/specs) | 4:1 | From the Event page | Nothing to upload | 600 max | Event name 255 | Not listed |
| [Thought leader](https://www.linkedin.com/help/lms/answer/a1399568) | The post's own | Single image or video specs | The author's post | The author's post | None, rolling out | None, rolling out |
| [Article and newsletter](https://business.linkedin.com/advertise/ads/sponsored-content/articles-and-newsletters-ads/specs) | Single image specs | Single image specs | The author's post | None | None | Unlock Article |
| [Connected TV](https://www.linkedin.com/help/lms/answer/a6282198) | 16:9 | 1920 x 1080 | MP4, 500 MB | Not listed | Not listed | Not listed |
| [Conversation](https://www.linkedin.com/help/lms/answer/a426057) | 1:1 image | 250 x 250, 300 x 250 banner | JPG or PNG, 5 MB, banner 2 MB | 8,000 a message | None | 25 characters, 5 a message |
| [Message](https://www.linkedin.com/help/lms/answer/a425533) | Banner only | 300 x 250 banner | JPG, PNG or static GIF, 2 MB | Body 1,500 | Subject 60 | 20 characters |
| [Text](https://www.linkedin.com/help/lms/answer/a423705) | 1:1 | 100 x 100 | JPG or PNG, 2 MB | Description 75 | 25 | None |
| [Spotlight](https://www.linkedin.com/help/lms/answer/a425222) | 1:1 logo | 100 x 100 logo, 300 x 250 background | JPG or PNG, background 2 MB | Description 70 | 50 | 18 characters |
| [Follower](https://www.linkedin.com/help/lms/answer/a420350) | 1:1 logo | 100 x 100 logo | JPG or PNG | Description 70 | 50 | Preset |
| [Lead Gen Form](https://www.linkedin.com/help/lms/answer/a423364) | Form image | 552 x 200 | Not given | Details 160 | 60 | Preset |

*Fig. 01: The 5 ratios behind most LinkedIn ads, drawn to scale at the same height, with the 1.91:1 landscape image in orange and the 4:1 event banner below.*

Download this table as a CSV, plus blank PNG templates at 1200 x 628, 1200 x 1200, 720 x 900, 1080 x 1080, 1920 x 1080, 720 x 1280, 300 x 250, 100 x 100 and 552 x 200.

## Single image ad specs

[LinkedIn's single image Help page](https://www.linkedin.com/help/lms/answer/a426534) is the fullest source. The [single image spec page](https://business.linkedin.com/advertise/ads/sponsored-content/single-image-ads-specs) repeats most of it, and its 2 differences are in the table near the end.

*Fig. 02: A single image ad in the feed with both of LinkedIn's cut-offs marked: the intro text truncates at 150 characters and the headline at 70.*

### Sizes and ratios

| Ratio | Recommended | Minimum | Maximum | Serves on |
| --- | --- | --- | --- | --- |
| 1.91:1 horizontal | 1200 x 628 | 640 x 360 | 7680 x 4320 | Desktop and mobile |
| 1:1 square | 1200 x 1200 | 360 x 360 | 4320 x 4320 | Desktop and mobile |
| 4:5 vertical | 720 x 900 | 360 x 640 | 2430 x 4320 | Mobile only |

*Fig. 03: The 3 single image ratios drawn as feed ads of the same width, where the 4:5 one runs tallest and serves on mobile only.*

The spec page calls 1:1 the recommended ratio for desktop and mobile. A 1:1.91 vertical image (628 x 1200) uploads but gets borders on both sides, which 4:5 avoids. Files can be JPG, PNG or GIF up to 5 MB, with animated GIFs capped at 250 frames.

*Fig. 04: A 628 x 1200 image picks up borders on both sides, and a 720 x 900 image at 4:5 fills the same space.*

LinkedIn scales oversized images down for you. An image under 401 pixels wide shows as a thumbnail instead.

### Text limits

| Field | Shown before truncation | Maximum |
| --- | --- | --- |
| Intro text | 150 | 3,000, with up to 10 emojis |
| Headline | 70 | 200 |
| Description | 100 | 300 |
| Ad name | Not shown to members | 255 |
| Destination URL | Not shown | 2,000 |

The 150 includes spaces, emojis and punctuation, and a link over 23 characters in the intro text gets shortened. The description shows only when the image is under 200 pixels wide or the ad runs on the LinkedIn Audience Network.

Paste intro text and a headline to see where LinkedIn truncates them: intro text at 150 characters (3,000 maximum) and headlines at 70 (200 maximum).

### 1200 x 627 or 1200 x 628?

The [Ads Guide](https://business.linkedin.com/advertise/ads/ads-guide) says 1200x627 pixels, while the spec page and the Help page say 1200 x 628. Both round to 1.91:1 and sit far inside the 640 x 360 to 7680 x 4320 range. Use 1200 x 628, the number on 2 of LinkedIn's 3 pages.

### Call to action buttons

The button is optional, and the spec page lists 10 labels: Apply, Download, View Quote, Learn More, Sign Up, Subscribe, Register, Join, Attend and Request Demo. The API spells them as values like `LEARN_MORE` (see the last section).

*Fig. 05: A single image ad with its optional button, next to the 10 labels the spec page lists for it.*

## Video ad specs

The [video Help page](https://www.linkedin.com/help/lms/answer/a424737) and the [video spec page](https://business.linkedin.com/advertise/ads/sponsored-content/video-ads/specs) agree on sizes and file limits. They part ways on the intro text maximum and the frame rate.

*Fig. 06: Video length on a log scale from 3 seconds to 30 minutes: LinkedIn recommends 15 to 30 seconds, and anything shorter than 30 loops.*

### Sizes

| Ratio | Recommended | Minimum | Maximum |
| --- | --- | --- | --- |
| 16:9 horizontal | 1920 x 1080 or 1200 x 675 | 640 x 360 | 1920 x 1080 |
| 1:1 square | Not given | 360 x 360 | 1920 x 1920 |
| 4:5 vertical, LinkedIn's recommended ratio | 720 x 900 | 360 x 450 | 1080 x 1350 |
| 9:16 vertical | 720 x 1280 | 360 x 640 | 1080 x 1920 |

The spec page allows a 5% aspect ratio tolerance. Nothing wider than 16:9 is accepted, and the Help page's example is a 1920 x 360 file that "is not tall enough for an ad."

*Fig. 07: The 4 video ratios at the same width on a phone, with LinkedIn's recommended 4:5 in orange, and a 1920 x 360 file too wide to be accepted.*

### File, length and sound

- MP4 from 75 KB to 500 MB. Apple ProRes isn't supported.
- 3 seconds to 30 minutes, with 15 to 30 seconds recommended. A video under 30 seconds loops until it reaches 30 seconds of playback.
- H.264 or VP8, under 30 frames per second, with AAC or MPEG4 audio under 64 kHz.
- Captions as an SRT file, plain text only.
- An optional thumbnail, JPG or PNG up to 2 MB, at the video's own ratio and resolution.
- 25 uploads per 24 hours in Campaign Manager, from a desktop only.

*Fig. 08: The 3 files behind a video ad: the MP4 itself, an optional thumbnail image and an optional SRT file for the captions.*

### Text limits

Intro text shows 150 characters and the headline 70, with a 200-character headline maximum. For the intro text maximum, the Help page says 3,000 and the spec page says 600. Write under 600 and both are satisfied.

The same Help page contradicts itself on emojis. It allows 10 in the intro text, then warns further down that an ad "might be rejected" for non-standard text, including more than 4 emojis. Keep it to 4.

## Carousel ad specs

A carousel holds 2 to 10 cards at 1080 x 1080, up to 4320 x 4320 and 10 MB a card ([carousel Help page](https://www.linkedin.com/help/lms/answer/a427022)). The feed shows each card at 312 x 312, so keep type on the cards large. Video cards aren't supported.

*Fig. 09: Carousel cards are uploaded at 1080 x 1080 and shown in the feed at 312 x 312, under a third of the upload's width.*

Intro text shows 150 characters and stops at 255. Card headlines get 45 characters whether the ad links to a URL or a Lead Gen Form, and they truncate after 2 lines. The Help page accepts JPG, PNG and non-animated GIF, while the [carousel spec page](https://business.linkedin.com/advertise/ads/sponsored-content/carousel-ads/specs) says JPG or PNG.

*Fig. 10: A carousel ad in the feed, with the intro text cut at 150 characters and 45 for each card's headline.*

Check every card before you save the ad, because the cards can't be edited after that. Buttons only appear on carousels that use a Lead Gen Form ([Sponsored Content specifications](https://www.linkedin.com/help/lms/answer/a423663)).

## Document ad specs

[Document ads](https://www.linkedin.com/help/lms/answer/a493903) take PDF, DOC, DOCX, PPT or PPTX up to 100 MB, 300 pages or 1 million words, and up to 5 documents per upload. With the lead generation objective only PDF works. The [document spec page](https://business.linkedin.com/advertise/ads/sponsored-content/document-ads/specs) recommends staying under 10 pages.

*Fig. 11: A document ad as a stack of pages: 300 is the ceiling, and LinkedIn recommends fewer than 10.*

Intro text shows 150 characters (3,000 maximum) and the headline 70 (200 maximum). The headline starts out as the file name, so upload deck_final_v7.pdf without renaming it and that is what members read under your ad. LinkedIn asks for layered PDFs to be flattened and every page fitted to 1 size. Video and animation show as stills, and links work only after a download.

*Fig. 12: A document ad with its page count under the preview, and the uploaded file's name standing in as the headline until you change it.*

## Thought leader ad specs

A thought leader ad sponsors a member's own post, so the post's format decides the specs ([Thought Leader Ads Help](https://www.linkedin.com/help/lms/answer/a1399568)).

*Fig. 13: Text, image, video, document, article and newsletter posts can run as thought leader ads, while polls, celebrations, multi-image posts and reposts can't.*

### Which posts qualify

Public text, single image, video, document, article and newsletter posts qualify, whether they come from employees or from members at any connection degree. Collaborative posts count too, as do attendee posts about a LinkedIn Live event your Page created. Celebrations, polls and multi-image posts aren't eligible, and a repost can't be sponsored, so you'd ask the original author instead.

The author's profile has to show their full name, and image and video posts must meet the specs above.

### Add-ons for a sponsored post

The [thought leader spec page](https://business.linkedin.com/advertise/ads/sponsored-content/thought-leader-ads/specs) still says you can't add a headline or intro text and that there's no URL field or button. Links in the author's own text stay clickable, and event thought leader ads do get a button.

LinkedIn's Help page for [authors approving a request](https://www.linkedin.com/help/lms/answer/a5964111), updated in early November 2026, describes 4 additions to the sponsored version of an approved post: a headline, a call to action button, a destination link and a Lead Gen Form. LinkedIn says it is "gradually making this feature available," so check your own Campaign Manager before planning around it.

*Fig. 14: A member's post as a thought leader ad, and the 4 additions LinkedIn is rolling out for it: a headline, a button, a destination link and a Lead Gen Form.*

## Event and article ad specs

Event ads promote a LinkedIn Event page and pull their 4:1 image from it, so there's nothing to upload. Intro text runs to 600 characters and the optional event name to 255. The URL has to point to a LinkedIn Event page ([event ad spec page](https://business.linkedin.com/advertise/ads/sponsored-content/event-ads/specs)).

*Fig. 15: Event ads reuse the Event page's 4:1 banner, and article and newsletter ads reuse the article's own image under the single image specs.*

Article and newsletter ads sponsor an article or newsletter already published on LinkedIn. They follow the single image specs and take no headline, intro text or URL of your own. With the lead generation objective, which works for articles but not newsletters, the ad gets an "Unlock Article" button, and other objectives show none ([article and newsletter spec page](https://business.linkedin.com/advertise/ads/sponsored-content/articles-and-newsletters-ads/specs)).

## Connected TV ad specs

[Connected TV ads](https://www.linkedin.com/help/lms/answer/a6282198) run on streaming platforms, and a video has to meet the specs below to be eligible.

*Fig. 16: Connected TV lengths on a 90-second dial: 7 lengths are accepted and the 4 LinkedIn recommends (6, 15, 30 and 60 seconds) are in orange.*

| Spec | Requirement |
| --- | --- |
| Resolution | 1920 x 1080 recommended, 1280 x 720 accepted |
| File | 16:9 MP4, H.264, up to 500 MB |
| Length | 6, 15, 30, 45, 60, 75 or 90 seconds |
| Video bit rate | 15 to 40 Mbps recommended |
| Frame rate | Constant, 23.98, 24, 25, 29.97 or 30 |
| Audio | 2 channels, -23 integrated LUFS, 48 kHz, PCM or AAC, at least 192 Kbps |

Some inventory may not take 75 or 90 seconds, so keep a 60-second cut ready. The Help page puts the minimum bit rate at 1.2 Mbps and the [connected TV spec page](https://business.linkedin.com/advertise/ads/sponsored-content/connected-tv-ads/specs) at 12 Mbps, and 15 Mbps or more clears both.

## Conversation and message ad specs

Both are Sponsored Messaging formats. A [message ad](https://www.linkedin.com/help/lms/answer/a425533) is a single message, while a [conversation ad](https://www.linkedin.com/help/lms/answer/a426057) opens with a message whose buttons lead to more messages.

*Fig. 17: A conversation ad branches from its intro message through up to 5 buttons a message, with 50 buttons as the limit for the whole conversation.*

| Field | Message ads | Conversation ads |
| --- | --- | --- |
| Subject | 60 | None |
| Message | 1,500 | 8,000 a message |
| Button text | 20 | 25 |
| Buttons | Not Interested added automatically | 5 a message, 50 a conversation, Not Interested included |
| Links | Up to 3 | Not listed |
| Image | None | 250 x 250, JPG or PNG, 5 MB |
| Desktop banner | 300 x 250, 2 MB | 300 x 250, 2 MB |
| Footer and terms | 20,000 | 20,000 |
| Landing page URL | 1,024 | Not listed |

*Fig. 18: A message ad next to a conversation ad, whose messages hold up to 5 buttons at 25 characters against the message ad's 20.*

Members in the European Economic Area and Switzerland only receive either format if they opted in to Sponsored Messaging in their inbox.

## Text, spotlight and follower ad specs

All 3 run in the right rail, and each has its own Help page: [text ads](https://www.linkedin.com/help/lms/answer/a423705), [spotlight ads](https://www.linkedin.com/help/lms/answer/a425222) and [follower ads](https://www.linkedin.com/help/lms/answer/a420350).

*Fig. 19: Text, spotlight and follower ads sit in the narrow right rail beside the feed, with much shorter text limits than a feed ad.*

| Field | Text ads | Spotlight ads | Follower ads |
| --- | --- | --- | --- |
| Image | 100 x 100, JPG or PNG, 2 MB | Logo, 100 x 100 minimum | Logo, 100 x 100 minimum |
| Headline | 25 | 50 | 50 |
| Description | 75 | 70 | 70 |
| Company name | Not listed | 25 | 25 |
| Button | None | 18 | Preset, such as Visit company |
| Background | None | Exactly 300 x 250, 2 MB or less | None |
| Destination URL | 500 | 500 | Your Page's tabs |

*Fig. 20: Text, spotlight and follower ads with their headline and description limits, and the spotlight background that has to be exactly 300 x 250.*

## Lead Gen Form specs

A [Lead Gen Form](https://www.linkedin.com/help/lms/answer/a423364) takes a 60-character headline, 160 characters of details and an optional image at 552 x 200. It can ask up to 12 questions, up to 3 of them custom at 100 characters each.

*Fig. 21: A Lead Gen Form with its 552 x 200 image on top and 12 question slots, the last 3 of them custom.*

Privacy policy text runs to 2,000 characters, each of up to 5 disclosure checkboxes to 500, and the thank-you message to 300. The landing page URL after the form takes up to 2,000 characters.

*Fig. 22: A Lead Gen Form, its thank-you message of up to 300 characters and the landing page after it, whose URL can run to 2,000.*

## Where LinkedIn's own pages disagree

LinkedIn publishes specs in 3 places: Help Center articles, the spec pages on business.linkedin.com and the Ads Guide. On November 7, 2026 they conflicted in 12 places, 1 of them inside a single Help page. Where they differ, use the stricter number and the ad passes whichever page Campaign Manager follows.

*Fig. 23: The Help Center and the spec pages as 2 overlapping sets: a number that fits inside both limits passes either page.*

| Spec | Help Center says | Spec page or Ads Guide says | Use | Checked |
| --- | --- | --- | --- | --- |
| Single image landscape size | [1200 x 628](https://www.linkedin.com/help/lms/answer/a426534) | [1200x627](https://business.linkedin.com/advertise/ads/ads-guide) in the Ads Guide | 1200 x 628 | 2026-11-07 |
| Single image description | [100 shown, 300 maximum](https://www.linkedin.com/help/lms/answer/a426534) | [70, Audience Network only](https://business.linkedin.com/advertise/ads/sponsored-content/single-image-ads-specs) | 70 or fewer | 2026-11-07 |
| Video intro text maximum | [3,000](https://www.linkedin.com/help/lms/answer/a424737) | [600](https://business.linkedin.com/advertise/ads/sponsored-content/video-ads/specs) | Under 600 | 2026-11-07 |
| Video frame rate | [Under 30](https://www.linkedin.com/help/lms/answer/a424737) | [30 recommended](https://business.linkedin.com/advertise/ads/sponsored-content/video-ads/specs) | 29.97 or lower | 2026-11-07 |
| Video emojis | [10 allowed, more than 4 may be rejected](https://www.linkedin.com/help/lms/answer/a424737) | Same Help page | 4 or fewer | 2026-11-07 |
| Carousel file types | [JPG, PNG, static GIF](https://www.linkedin.com/help/lms/answer/a427022) | [JPG or PNG](https://business.linkedin.com/advertise/ads/sponsored-content/carousel-ads/specs) | JPG or PNG | 2026-11-07 |
| Document file types | [5 types](https://www.linkedin.com/help/lms/answer/a493903) | [3 in the Ads Guide](https://business.linkedin.com/advertise/ads/ads-guide) | Any of the 5, PDF for lead generation | 2026-11-07 |
| Text ad headline | [25](https://www.linkedin.com/help/lms/answer/a423705) | [50 in the Ads Guide](https://business.linkedin.com/advertise/ads/ads-guide) | 25 | 2026-11-07 |
| Text ad URL length | [500](https://www.linkedin.com/help/lms/answer/a423705) | [2,000](https://business.linkedin.com/advertise/ads/text-ads/specs) | Under 500 | 2026-11-07 |
| Connected TV minimum bit rate | [1.2 Mbps](https://www.linkedin.com/help/lms/answer/a6282198) | [12 Mbps](https://business.linkedin.com/advertise/ads/sponsored-content/connected-tv-ads/specs) | 15 Mbps or more | 2026-11-07 |
| Thought leader documents | [Eligible](https://www.linkedin.com/help/lms/answer/a1399568) | [Not eligible](https://business.linkedin.com/advertise/ads/sponsored-content/thought-leader-ads/specs) | Eligible, per the newer Help page | 2026-11-07 |
| Thought leader buttons | [Rolling out](https://www.linkedin.com/help/lms/answer/a5964111) | [None](https://business.linkedin.com/advertise/ads/sponsored-content/thought-leader-ads/specs) | Check your own account | 2026-11-07 |

Each time LinkedIn changes a number, a new row goes in with the date it was checked.

## Creating ads through the API

Campaign Manager's labels aren't the API's field names. In the [Posts API](https://learn.microsoft.com/en-us/linkedin/marketing/community-management/shares/posts-api), intro text is `commentary`, the destination is `contentLandingPage` and the button is `contentCallToActionLabel`. The [post schema](https://learn.microsoft.com/en-us/linkedin/marketing/community-management/shares/post-api-schema) takes 13 button values: the 10 Campaign Manager labels, `SEE_MORE`, and `BUY_NOW` and `SHOP_NOW` from version 202504.

*Fig. 24: Campaign Manager's field names on the left and the Posts API fields that hold them on the right, with the button field in orange.*

The ad format is fixed when the ad set, which the API calls a campaign, is created. Every creative has to match it, and video, carousel and dynamic ad sets need it set at creation ([Campaigns API](https://learn.microsoft.com/en-us/linkedin/marketing/integrations/ads/account-structure/create-and-manage-campaigns)). Campaign Manager won't change it after launch either ([Edit an ad set](https://www.linkedin.com/help/lms/answer/a425248)).

*Fig. 25: An ad set's format is fixed when it's created, so a video ad set takes video creatives and refuses a single image.*

If you edit a live ad's post through the API, the change doesn't show in Campaign Manager's editor, so new copy goes out as a new ad ([Adwarp's ad tools](https://adwarp.dev/docs/tools/campaigns)).

### In practice: specs checked before the call

Adwarp, an open-source MCP server and CLI for LinkedIn Ads and Google Ads, checks some of these limits before a call reaches LinkedIn. `create_text_ad` refuses a headline over 25 characters or a description over 75. `create_image_ad` sends the intro text as `commentary` along with the headline, the destination URL and 1 of 11 button values (the 10 labels plus `SEE_MORE`), and the ad lands as a LinkedIn draft. To change a live ad's copy, Adwarp deletes it with `delete_ad` and creates a new draft. `create_post_ad` sponsors a member's approved post for a thought leader ad, and came in Adwarp 0.5.0.

Before it creates anything, the [linkedin-campaign-launch skill](https://adwarp.dev/docs/skills/linkedin-campaign-launch) checks each ad's hook against the 150-character cut-off and its headline against 70. Here it is on the skill's made-up Northwind example:

```text
> Check the 4 approved Northwind ads against LinkedIn's cut-offs, then create them as drafts
Intro text   A 124   B 118   C 116   D 104   cut-off 150
Headline     A 25    B 37    C 43    D 41    cut-off 70
All 8 fit before LinkedIn truncates them
adwarp.create_image_ad "A outcome" DOWNLOAD a-outcome.png  DRAFT
adwarp.create_image_ad "B checklist" DOWNLOAD b-checklist.png  DRAFT
adwarp.create_image_ad "C peer proof" DOWNLOAD c-peer-proof.png  DRAFT
adwarp.create_image_ad "D template" DOWNLOAD d-template.png  DRAFT
4 draft ads in ad set WV | Finance Dir+ 201-5k | US CA | 5-Day Close Guide
Drafts only. Nothing spends until you switch them on.
```

Put it to work: [LinkedIn Ads campaigns](https://adwarp.dev/linkedin-ads/campaigns). Build LinkedIn campaigns, ad sets and ads from your terminal, created as drafts until you switch them on.

## Questions

### What size is best for a LinkedIn ad?

For a single image ad, 1200 x 628 pixels (1.91:1) is LinkedIn's recommended landscape size and 1200 x 1200 its recommended square. LinkedIn's spec page calls 1:1 the recommended ratio for desktop and mobile, while 720 x 900 vertical images serve on mobile only.

### What are the recommended LinkedIn ad sizes for 2026?

Single image ads take 1200 x 628, 1200 x 1200 or 720 x 900, carousel cards 1080 x 1080, and video 1920 x 1080, 720 x 900 or 720 x 1280. Each matches LinkedIn's Help Center as checked on November 7, 2026.

### Is the LinkedIn ad size 1200 x 627 or 1200 x 628?

LinkedIn's Ads Guide says 1200x627, while its single image spec page and Help Center both say 1200 x 628. Both are 1.91:1 and well inside the size limits. Use 1200 x 628.

### Should a square ad be 1080 x 1080 or 1200 x 1200?

Use 1200 x 1200 for a single image ad and 1080 x 1080 for carousel cards, the recommended size for each format. Carousel cards display at 312 x 312, so a 1080 upload is still more than 3 times the width the feed shows.

### What are the character limits for LinkedIn ad copy?

On single image and video ads, intro text shows 150 characters before it truncates and accepts 3,000, and headlines show 70 and accept 200. Carousel intro text stops at 255 and card headlines at 45. Text ads take a 25-character headline and a 75-character description.

### What is the maximum video file size and length?

500 MB and 30 minutes, with a minimum of 75 KB and 3 seconds. LinkedIn recommends 15 to 30 seconds, and guides that still say 200 MB are out of date.

### Do vertical images show on desktop?

No. LinkedIn serves vertical single image ads on mobile only, and its spec page says they don't deliver to desktop. Use 1:1 or 1.91:1 when the ad needs to reach desktop too.

### What happens if an ad doesn't meet the specs?

LinkedIn scales oversized images down on its own and truncates text past the shown limit in the feed. A file outside the allowed ratios can't be used, and LinkedIn's video Help page warns that an ad might be rejected for non-standard text, such as more than 4 emojis.

### Do thought leader ads have their own specs?

No. A thought leader ad uses the specs of the post it sponsors, so image posts follow the single image specs and video posts the video specs. LinkedIn is gradually letting advertisers add a headline, a button, a link and a Lead Gen Form to the sponsored version.

## Related

- [LinkedIn ad examples](https://adwarp.dev/blog/linkedin-ad-examples): Over 100 LinkedIn ads from the Ad Library, sorted by the formats on this page.
- [LinkedIn thought leader ads](https://adwarp.dev/blog/linkedin-thought-leader-ads): Setup on both sides of the approval, LinkedIn's new add-ons and what these ads cost.
- [The LinkedIn Ads API](https://adwarp.dev/blog/linkedin-ads-api): Access, headers, required fields and the other parts of the Marketing API its docs leave out.

Canonical page: https://adwarp.dev/blog/linkedin-ad-specs
Last updated: 2026-11-07