LinkedIn Carousel Size: PDF Dimensions and Slide Limits

The usual LinkedIn carousel size is a 4:5 portrait PDF, typically designed at 1080 × 1350 pixels, with a 1:1 square at 1080 × 1080 as the common alternative. These are common practice, not official rules: at the time of writing, LinkedIn's help center lists file limits for documents but no recommended page dimensions, so check its current help page before relying on any number. This post covers sizes, margins, page counts and file limits. For structuring and publishing the carousel itself, see our LinkedIn carousel guide.

LinkedIn carousel dimensions at a glance

Portrait 4:5 is the common default because it uses more of the vertical space in a mobile feed than a square does. Some designers work at 1200 × 1500; that is still 4:5 and displays the same way. LinkedIn's help center notes that PDFs with pages of different sizes must be fit to the same page size, so use one size for every page, cover included.

Pixels vs page size: setting up a 4:5 canvas

A PDF stores its page size as physical dimensions, in points or inches, not pixels, and the viewer scales each page to fit the screen. What carries over is the ratio. A 1080 × 1350 canvas and a 7.5 × 9.375 inch slide are both 4:5 and fill the same space. Pixel counts matter for the photos placed on a page, not for the page itself.

To set up a 4:5 page (menu names vary between versions):

1. PowerPoint: open Design, then Slide Size, then Custom Slide Size, and enter 7.5 × 9.375 inches (19.05 × 23.81 cm) in portrait. WPS has a similar slide size setting under its Design tab.
2. Google Slides: open File, then Page setup, choose Custom and enter 1080 × 1350 pixels.
3. Keynote: in the Document sidebar, set the slide size to Custom and enter 1080 × 1350.
4. Build the layout at that size from the start. Converting a finished 16:9 deck means repositioning every text box and image by hand.
5. Export to PDF, open the file and confirm every page shows 4:5 proportions before you upload.

Safe margins and font sizes

The document viewer may show controls such as page counters or arrows near the edges of the page, and their position varies by app and screen size. A safe margin keeps important content clear of them.

• Keep 60 to 80 px of margin on every side of a 1080 px wide page, roughly 6 to 8 percent of the width.
• Place headlines and key numbers in the upper two thirds of the page.
• Keep handles, logos and page numbers inside the margin, not touching the edge.
• To reuse the set as squares later, keep key content inside the central 1080 × 1080 area.

On a 7.5 inch wide slide that maps to 1080 px, one point equals about two pixels, so the sizes translate cleanly:

Use regular or heavier weights for body text; light weights tend to look soft at phone width.

How many slides should a LinkedIn carousel have?

LinkedIn doesn't publish an ideal page count for organic document posts. Its help center sets an upload limit of 300 pages, far beyond what anyone swipes through, and its ads guide suggests keeping sponsored document ads under 10 pages. For organic carousels, these working ranges are common:

• 5 to 7 pages: one tight idea, such as a single framework or a before-and-after.
• 8 to 12 pages: the usual range. A cover, some context, five or six ideas, a summary and a closing question.
• 13 pages or more: suits checklists and step-by-step guides, but each extra page is another point where readers may stop. Consider a series instead.

Let the content set the count. If two pages make the same point, merge them. The $1M ARR carousel example in our gallery turns a growth retrospective with five tactics into eight 4:5 pages.

File size and upload limits

According to LinkedIn's help center, a document shared in a post can be up to 100 MB and 300 pages, in PPT, PPTX, DOC, DOCX or PDF format. The same help pages say you can add one document per post, that the document needs a title, and that after posting you can edit the title and description but not replace the file. LinkedIn updates these pages, so check the current version before you depend on them.

A few practical habits keep the file well inside those limits:

• A carousel of text, shapes and a few images is usually a few megabytes. If yours runs to tens of megabytes, uncompressed photos are the likely cause; size them to about twice the space they occupy on the page.
• Embed fonts on export so the PDF looks the same on every device.
• Write the document title as a clear description, such as "5 pricing lessons from our first 100 customers", not a file name like "final_v3".

If your pages look soft after uploading, our guide to fixing a blurry LinkedIn PDF carousel walks through the export settings.

How the size shapes your cover

The cover is what people see in the feed before they decide to swipe, and it must share the page size of every other page. One PDF can't hold a taller cover, so the page ratio decides how much room the cover gets.

• At the same width, 4:5 gives you 25 percent more height than a square. That fits a headline of up to about ten words plus a short subline.
• Size the cover headline for the preview, not for full screen. If it reads at half a phone's width, it will read in the feed.
• Keep the headline in the upper half to two thirds, clear of the lower edge where viewer controls may appear.
• Keep the headline as live text rather than part of a background image, so it stays crisp.

For what to write on that cover, see LinkedIn carousel hooks.

Making a 4:5 LinkedIn carousel with AI

If you would rather not set canvases and margins by hand, our AI studio is built to produce high-quality, editable slides, and its article-to-carousel workflow handles the sizing for you:

1. Paste your post or article (up to 100,000 characters), upload a .docx, .pdf, .txt or .md file, or import a web page URL. Choose LinkedIn as the platform.
2. Review the page-by-page outline the AI drafts and edit it; drafting the outline uses no credits.
3. Generate. Each page costs 2 credits with AI images included, the total is shown before you start, and credits come back automatically if a generation fails.
4. Download the 4:5 PDF and attach it as a document post. Exports carry a small "AI-generated" label.

Text-based PDFs are read in your browser; a scanned PDF needs OCR or pasted text first. For more on this workflow, see the carousel solution page.

FAQ

What size should a LinkedIn carousel be?

A 4:5 portrait page, typically 1080 × 1350 pixels, is the common choice because it fills more of a phone screen than a square. A 1:1 square at 1080 × 1080 is the usual alternative. Whichever you pick, use it for every page: LinkedIn's help center says PDFs with pages of different sizes must be fit to the same page size.

How many slides should a LinkedIn carousel have?

There is no official ideal number. A common range is 8 to 12 pages: enough for a hook, five or six ideas and a closing question, short enough to finish. LinkedIn's help center lists an upload limit of 300 pages, and its ads guide suggests under 10 pages for sponsored document ads. Cut any page that repeats an earlier one.

What is the maximum file size for a LinkedIn document post?

LinkedIn's help center lists a limit of 100 MB and 300 pages per document, in PPT, PPTX, DOC, DOCX or PDF format. Limits can change, so check the current help page or the message on the upload screen. A carousel of text and graphics is usually far smaller than that cap.

Can I upload a 16:9 PowerPoint as a LinkedIn carousel?

You can, since PPT and PPTX are accepted formats, but landscape pages appear small on a phone and the text gets hard to read. For a carousel, change the slide size to 4:5 portrait, enlarge the text and export a PDF so fonts and layout stay as you designed them.