What are the correct dimensions for a LinkedIn carousel?
LinkedIn carousels should be built at 1080×1080px (square) or 1080×1350px (4:5 portrait) per slide, exported as a single PDF and uploaded through the "Add a document" option. Square is the safer default for readability across devices, while portrait uses more vertical feed space on mobile, where most LinkedIn traffic happens.
LinkedIn doesn't publish an official carousel dimension spec — carousels are technically PDF documents uploaded through the post composer, not a dedicated carousel feature — so the sizing convention comes from what consistently displays cleanly inside the feed's document viewer without cropping, awkward margins, or LinkedIn compressing the file into blurriness.
1080×1080px (square) is the safer default because it displays fully in both the desktop and mobile feed without the top or bottom getting clipped by the viewer's preview window. 1080×1350px (4:5 portrait) takes up more vertical screen space on mobile, which can increase dwell time since it's harder to scroll past — but it's more prone to minor cropping in some feed previews, so test it before committing an entire content calendar to portrait.
Whichever ratio you choose, keep it consistent across every slide in a single carousel — mixing square and portrait slides in one document creates jarring size jumps as readers swipe through. Export everything as one combined PDF, not individual image files, since LinkedIn's carousel format only accepts document uploads. CarouseLabs applies the correct dimensions and exports a ready-to-upload PDF automatically, so you don't have to set canvas sizes by hand in a design tool.
Leave a safe margin inside every slide, regardless of which ratio you pick. LinkedIn's document viewer sometimes shows a thin surrounding frame or slightly different crop across desktop, mobile, and shared-link previews, so text or logos placed flush against the edge can end up clipped in at least one of those views. Keeping key content roughly 60-80px inside the border on all sides avoids that problem without noticeably shrinking the usable slide area.
Key Points
- 1080×1080px (square) is the safest default for full display across devices
- 1080×1350px (4:5 portrait) uses more mobile screen space, but test it before committing fully
- Keep every slide in a carousel the same dimensions — never mix ratios within one document
- Export as a single combined PDF, not separate image files — LinkedIn's carousel upload only accepts documents
Example
A creator posting a 9-slide "lessons from my first year of freelancing" carousel builds every slide at 1080×1080px, combines them into one PDF using consistent margins, and uploads it via "Add a document" — rather than uploading 9 separate JPGs, which LinkedIn doesn't support as a swipeable carousel.
Related Questions
Does LinkedIn compress carousel images?
Yes, LinkedIn compresses uploaded documents somewhat, but starting at 1080px wide keeps quality well above the compression threshold, so text and graphics stay sharp after upload.
How many slides should a LinkedIn carousel have?
Most high-performing carousels run 7-9 slides — enough to set up a hook, deliver substance, and close with a takeaway, without losing readers who drop off in longer decks.
More Questions in Carousels
- How many slides should a LinkedIn carousel have?
- What is the file size limit for a LinkedIn carousel?
- What is the best aspect ratio for a LinkedIn carousel?
- What are the PDF requirements for a LinkedIn carousel?
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