LinkedIn Carousel Size: Exact Dimensions and Specs for 2026

If you only need one LinkedIn carousel size, use 1080 x 1350 px. That is portrait, a 4:5 aspect ratio, and it is the best default for most carousel posts in 2026.

This page is intentionally narrow. It is not a full carousel creation guide. If you want the step by step process for designing, exporting, and posting one, use our full guide on how to make a LinkedIn carousel. This page answers the spec question: what size should the slides be, what format should the file use, and what can break the rendering.

TL;DR

• 📐 Best default size: 1080 x 1350 px portrait, a 4:5 ratio.
• 📱 Best reason to use it: portrait gives you the most vertical space on mobile and the highest dwell time potential.
• 🟦 Safe classic size: 1080 x 1080 px square, a 1:1 ratio.
• 🖥️ Use landscape sparingly: 1920 x 1080 px, a 16:9 ratio, takes the least mobile screen space.
• 📄 File type: LinkedIn carousels are document posts. Export one PDF, where each PDF page is one slide.
• 🔁 Consistency rule: all slides must share the same dimensions. Mixed sizes break rendering.
• 📦 Practical limit: LinkedIn allows large PDFs, officially up to about 300 pages / 300MB, but keep it under about 10MB when you can.

LinkedIn carousel size and dimensions table

These are the three LinkedIn carousel sizes worth using. Pick one before you design the first slide, then keep every page in the PDF at that same size.

Do not invent a fourth size because it looks good in your design tool. LinkedIn carousels are document posts, and predictable page dimensions matter more than novelty. If one page is portrait, the next is square, and the next is landscape, the PDF can render awkwardly in the feed. One carousel, one size.

Which LinkedIn carousel size should you use?

Use 1080 x 1350 px portrait (4:5) unless you have a specific reason not to.

The reason is simple: LinkedIn is a mobile heavy feed. A portrait carousel fills more of the vertical screen than a square or landscape deck. That gives your first slide more presence, gives your headline more room, and reduces the amount of competing feed noise around the post.

That extra screen space matters because carousels work only when people stop and swipe. A taller slide gives the reader more to see before they move on. If the content is useful, that can support dwell time, and dwell time is one of the signals people pay attention to when they study LinkedIn distribution. We explain the broader feed mechanics in how the LinkedIn algorithm works.

Square still works. It is familiar, stable, and easy to reuse across design systems. If your team already has square templates, 1080 x 1080 px is a reasonable choice.

Landscape is the one to question. A 1920 x 1080 px slide can look strong on desktop, but inside the mobile feed it becomes a shorter band. That gives you less readable space and makes dense text feel even smaller. Use it for genuinely wide visuals, not as your default carousel format.

File specs for LinkedIn carousel PDFs

The slide dimensions are only part of the spec. LinkedIn carousels are not uploaded as separate images. They are document posts, usually a PDF, where each page becomes one slide.

Format: PDF. Export to PDF for the final upload. LinkedIn also accepts PPTX and DOCX, but PDF renders most consistently because it preserves layout, spacing, and fonts better across devices.

Page setup: one PDF page equals one slide. If your carousel has eight slides, your exported PDF should have eight pages. Do not upload eight separate image files and expect LinkedIn to turn them into a carousel.

Same dimensions on every slide. All slides must share the same dimensions. Mixed sizes break rendering. If slide one is 1080 x 1350 px, every other slide in that PDF should also be 1080 x 1350 px.

Practical file size: under about 10MB. LinkedIn allows large PDFs, officially up to about 300 pages / 300MB. That is a ceiling, not a target. In practice, a smaller PDF loads faster, previews more cleanly, and is easier to post. Keep it under about 10MB when you can.

Practical slide count: 6 to 12 slides. Most good carousels are 6 to 12 slides. That is usually enough room to teach one idea, show a short framework, or walk through a checklist without asking the reader to swipe forever.

Safe margin: keep key text away from the extreme edges. Different devices can frame content slightly differently. Do not put important words, numbers, or visual cues right against the border. Leave a sensible margin so nothing important feels clipped. There is no exact official safe zone pixel value to memorize here. Just avoid edge hugging.

Quick setup checklist before you export

Before you upload the PDF, check the boring things. They are the things that save you from deleting and reposting.

• Your deck uses one size from the table above.
• Every slide has the same dimensions.
• The export is one PDF, not separate slide images.
• The PDF pages are in the right order.
• Key text sits away from the extreme edges.
• The final PDF is reasonably small, ideally under about 10MB.
• The deck is focused enough to finish, usually 6 to 12 slides.

If the slide copy feels too small at 1080 x 1350 px, the fix is usually not a different canvas. The fix is fewer words. One slide should carry one idea. A carousel is a sequence, not a compressed blog post.

Now build the carousel

You now have the specs: 1080 x 1350 px portrait as the default, square as the safe fallback, landscape only when the content truly needs width, one consistent size across the whole PDF, and a small final file.

For the actual build and posting flow, use the full walkthrough: How to make a LinkedIn carousel. It covers the parts this page deliberately skips, including how to structure the slides, export the PDF, upload the document post, and write the caption.

If the blank slide is the hard part, WriteHero can help you turn the idea into slide copy and a caption that still sounds like you. Start with the LinkedIn post generator, then check the caption before publishing with the LinkedIn post preview.