LinkedIn Carousel Size and Dimensions

LinkedIn carousel dimensions at a glance

A LinkedIn carousel is a document post, and LinkedIn does not publish one required pixel size for documents. Its ad specs for document posts accept vertical, horizontal and square pages (LinkedIn document ads specs). So the size is your choice, and the choice comes down to how the slides look on a phone.

Why 4:5? It matches the tallest ratio LinkedIn allows for photos in the feed, which can range from 3:1 to 4:5 (LinkedIn Help). Taller than that is not something we would rely on. Wider slides work, but they take up less of the screen when someone scrolls on a phone, so text has to be larger to stay readable.

Which LinkedIn carousel size should you choose?

Start from where the slides came from and where else they will go.

• Writing a carousel for LinkedIn first? Use 4:5. Text can be larger, and each slide fills more of the screen when someone scrolls on a phone.
• Posting the same slides on Instagram too? 4:5 works there as well, so one design covers both. Our Instagram carousel size guide has the details for that side.
• Turning a talk or webinar deck into a carousel? Keep 16:9 rather than squeezing slides into a new shape, but cut the text per slide and enlarge it.
• Mostly visuals, little text? Square 1:1 is a safe middle ground that also suits most other networks.

Whatever you pick, use it for every page. Changing sizes halfway through a document makes the viewer resize between slides, which looks like a mistake.

LinkedIn PDF carousel specs and limits

These are the limits LinkedIn states for documents attached to a post.

LinkedIn recommends converting files to PDF before you upload, and flattening or merging PDFs that have several layers. A PDF also keeps your fonts and layout exactly as you designed them, which a PowerPoint file may not.

How many slides can a LinkedIn carousel have?

Up to 300 pages, as long as the file stays under 100 MB. In practice you want far fewer. LinkedIn’s own advice for document ads is to keep them under 10 pages, and the same logic applies to organic posts: every slide you add is another chance for a reader to stop.

A range of 6 to 12 slides covers most topics: a cover, the body, a recap and a closing slide. If you find yourself past 15, the topic is probably two carousels.

Safe margins for LinkedIn carousel slides

LinkedIn sets no margin rule for documents, but margins still matter. Text pushed to the edge feels cramped on a small screen and is easy to cut off if you resize the design later.

• Outer margin: keep text and key visuals at least 60 to 80 px from every edge of a 1080 px wide slide.
• Footer band: reserve the bottom 80 to 120 px for a small repeated element, such as your name, handle or slide number, and keep main content above it.
• Same frame on every slide: headline, body and footer in the same positions make the swipe feel smooth.

Font sizes for LinkedIn carousels

There is no official rule here; these are the sizes we use for a 1080 px wide slide so text stays readable on a phone without zooming.

For 16:9 slides at 1920 × 1080, scale these up by about a third, since the slide is shown smaller on mobile. Bold sans-serif fonts at these sizes read well; thin or script fonts usually do not.

How to keep the PDF file size down

A text-and-shapes carousel is usually tiny. File size grows with photos and screenshots. If you get close to the 100 MB cap, or uploads feel slow:

• Export at 1080 px wide (or double at most) instead of print resolution.
• Use JPG for photos and PNG for flat graphics and screenshots with text.
• Remove hidden layers and unused pages before exporting.
• If you have the slides as images, combine them with the free images to LinkedIn carousel PDF tool, which keeps every page the same size.

LinkedIn carousel sizes in Postora

In the Postora studio, LinkedIn carousels come in the three sizes above: 4:5 (the default), 1:1 and 16:9. You can switch between them at any point and the layout adjusts. Export the finished carousel as a PDF ready to upload, or as PNG images.

Every LinkedIn carousel template is built with the margins and type sizes in this guide, so you can focus on what the slides say.