LinkedIn Post Sizing: What to Export for Each Post Type

LinkedIn post sizing depends on the post type, and ads follow separate specs. A photo needs a width to height ratio between 3:1 and 4:5, ideally 1080 pixels wide, and 5 MB at most. A video must stay between 1:2.4 and 2.4:1 and under 5 GB. A document has no page size, only 100 MB, 300 pages and the same size for every page. Article, newsletter and event covers use 16:9.

LinkedIn post sizes by post type

Every figure below comes from LinkedIn's help pages, read on 17 September 2026. Where LinkedIn publishes no number, the line says so.

• Photo post. At least 552 by 276 pixels, 1080 wide recommended, a ratio from 3:1 to 4:5 and 5 MB per upload, per the share photos help page, which says an image beyond that range is centered and cropped to fit. 1080 by 1350, 1080 by 1080 and 1200 by 628 all fit. JPEG, PNG and GIF work everywhere, HEIF/HEIC on iOS and WEBP on Android (media file types).
• Multi-photo post. Up to 20 photos. The container stops at 4:5, the first image sets the layout, and images in the bottom row can be cropped.
• Video post. One per post, 75 KB to 5 GB, 3 seconds (2 from the mobile app) to 15 minutes, 256 by 144 to 4096 by 2304 pixels, a ratio from 1:2.4 to 2.4:1, per the share videos help page. LinkedIn recommends no pixel size, and asks you to keep text and logos away from every edge, where its interface can cover them.
• Document post. A PDF, PPT, PPTX, DOC or DOCX file up to 100 MB and 300 pages, per the documents help page. No page size is published. Its only shape rule is that a PDF with pages of different sizes must be fit to one page size. Layered PDFs must be flattened. This is the post people call a carousel.
• Link post. A post carries a link or an image, not both, and LinkedIn builds the preview from the shared page. A custom image on a Page post with a URL should be 1.91:1 (1200 by 627) and wider than 200 pixels, per the Pages image specifications.
• Article or newsletter edition cover. 1920 by 1080 is the optimal size, and covers are cropped to 16:9, per the article media page. A newsletter logo is 300 by 300 (newsletter best practices).
• Event cover. 16:9 is required, at least 480 pixels wide, with 1280 by 720 among the listed sizes (create an event).
• Text. 3,000 characters for a post, 125,000 for an article (posts versus articles).

Size any post in five steps

1. Pick the container first. The same slide follows different rules as a photo, a document page or a cover. If you are unsure which container suits the idea, LinkedIn Post Formats: Nine Options and One Rule to Choose compares them by what the reader does next.
2. Set the shape, then the pixels. Divide width by height. A photo needs 0.8 to 3.0, a video about 0.42 to 2.4, a cover 1.78. Then pick the pixel count: 1080 wide or more for a photo, 1920 by 1080 for an article cover. The shape is what gets you cropped, as LinkedIn Image Post Dimensions: The Window, Not the Number explains.
3. Keep text off the edges. Article covers are cropped to 16:9, and the interface can overlap a video's borders. LinkedIn publishes no margin in pixels, so the margin you leave is a design choice.
4. Export under the file limit. That is 5 MB for a photo, 100 MB for a document, 5 GB for a video. LinkedIn advises converting documents to PDF where possible.
5. Check the file, then the preview. On a Mac, sips -g pixelWidth -g pixelHeight slide.jpg prints an image's dimensions; for a PDF, pdfinfo from the free poppler tools prints one size line per page. Then read the composer preview, because a photo cannot be resized or edited after posting, and a document file cannot be replaced, only its description.

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LinkedIn publishes no page size for document posts; its only shape rule is that every page must share one size.

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Worked example: one slide deck, four containers

This is a fictional case. A freelance web designer has a seven-slide website launch checklist built at 1920 by 1080 and wants to use it four ways on LinkedIn.

As a document post, the deck works as it is. Export a flattened PDF and run:

pdfinfo -f 1 -l 999 launch-checklist.pdf | grep "size"

Seven page lines showing the same size, and a file size line under 100 MB, mean the deck is ready.

As a photo post of slide one, 1920 divided by 1080 is 1.78, inside the 0.8 to 3.0 window, and 1920 is above the 1080 recommendation, so nothing is cropped. The cost is height: when both fill the same column width, a 16:9 image is 45 percent as tall as a 4:5 one (0.8 divided by 1.78). If the slide is dense, rebuild it on a 1080 by 1080 canvas, which is 80 percent as tall as a 4:5 image.

As a newsletter edition cover, 1920 by 1080 is the recommended size and already 16:9, so the crop removes nothing.

As a 90-second screen recording, 1920 by 1080 is inside the 4096 by 2304 maximum, 1.78 is inside the 2.4 limit, and 90 seconds is inside 3 seconds to 15 minutes.

Now the case that breaks the document. The designer adds an eighth page, a client testimonial copied from a letter-size PDF. The same check now ends with a line reading 612 x 792 pts (letter): the file mixes two page sizes, which LinkedIn requires you to fit to one. Place the testimonial on a 1920 by 1080 page, export again, and rerun the check until every page line matches.

Why size guides disagree with these numbers

Some guides ranking for this search differ from LinkedIn's pages today. Sendible's guide, dated 19 August 2026, lists 1200 by 644 for an article image, 200 MB and up to 10 minutes for video, and letter size as the recommended dimensions for PDFs. LinkedIn's pages give 1920 by 1080 cropped to 16:9, 5 GB and 15 minutes, and no page size for documents.

LinkedIn's own pages disagree on video length. The share videos page gives 15 minutes. The article media page, whose table is labeled as the same requirements as the share box, lists 15 minutes from desktop and 10 from the mobile app. From your phone, stay under 10 minutes and both pages are satisfied.

When these sizes do not apply

These are organic post specifications. An ad built in Campaign Manager follows the ads pages: single image ads recommend 1200 by 628, 1200 by 1200 or 720 by 900, and carousel ads use 2 to 10 image cards with 1080 by 1080 recommended. A link preview is not an export setting at all, since LinkedIn builds it from the shared page; LinkedIn Post Inspector: What It Fixes and What It Cannot covers that repair.

If a tool publishes for you, ReadyToPost included, run the same ratio and page checks on the file it uploads, not only on the file you designed.

Rename each LinkedIn template with its container and the date you checked the help page, for example "photo 4x5 checked 2026-09-17". When a page changes, you will know which templates to open.