LinkedIn Post Size: Image, Document & Carousel Specs (2026)
Use 1080 × 1350 px (4:5) for LinkedIn image posts and carousel pages; LinkedIn accepts images from 3:1 to 4:5, up to 5 MB each.
LinkedIn supports single photos, multi-photo posts up to 20 images, and swipeable document carousels as PDFs up to 300 pages and 100 MB.
Why post dimensions matter on LinkedIn
- LinkedIn recommends images 1080 px wide, so designing at that width keeps you inside its guidance.
- 4:5 portrait maximizes mobile feed height, while 1:1 square balances mobile and desktop display.
- Using consistent dimensions on every page keeps slides smooth when readers swipe.
| Format | Recommended Size | Accepted Specs | Details |
|---|---|---|---|
| Single Image Post | 1080 × 1350 px (4:5) | 3:1 to 4:5 ratio, 5 MB max | Wider ratios are cropped; photos cannot be edited after posting. |
| Square Image Option | 1080 × 1080 px (1:1) | 1:1 ratio, 5 MB max | Balanced desktop and mobile display; minimum 552 × 276 px. |
| Multi-Photo Post | 1080 × 1350 or 1080 × 1080 | Up to 20 photos, 5 MB each | Renders at max 4:5 ratio; layout depends on the first image. |
| Document Carousel (PDF) | 1080 × 1350 or 1080 × 1080 | PDF, PPT, DOC; 100 MB, 300 pages max | Convert to PDF for best quality; flatten layers before upload. |
6 steps to prepare and check your LinkedIn post size
- 1
Choose your post format
Decide between a single photo, up to 20 photos, or a swipeable document carousel.
- 2
Set canvas dimensions
Design slides or photos at our recommended 1080 × 1350 px (4:5) or 1080 × 1080 px (1:1).
- 3
Keep dimensions identical
Use matching dimensions on every page of your document to prevent jumps.
- 4
Verify size and format limits
Confirm photos are under 5 MB and documents are under 100 MB and 300 pages.
- 5
Flatten layered PDFs
Flatten or merge layers in your PDF before upload, as LinkedIn requires.
- 6
Check margins and preview
Ensure text stays inside outer margins using our social safe zones tool before uploading.
Common mistakes to avoid
Uploading photos outside 3:1 to 4:5 — LinkedIn centers and crops them to fit.
Attempting to edit photos after posting — LinkedIn does not allow image changes once live.
Uploading a layered PDF — LinkedIn asks you to flatten or merge layers before upload.
The hard part isn't the size — it's the slides.
EasySociable turns your ideas into on-brand slides sized for LinkedIn. Choose from 48 ready-made templates or ask your AI agent to format your content in seconds, customize colors, and export clean slides.
Proven viral formulas ready for LinkedIn
Pick a formula below to generate a branded LinkedIn carousel with your AI agent or Studio.
Frequently Asked Questions
What is the recommended size for a LinkedIn post image?
We recommend 1080 × 1350 pixels (4:5 portrait) for feed height or 1080 × 1080 pixels (1:1 square) for balanced display.
What are the file size and dimension limits for LinkedIn photos?
LinkedIn accepts photos up to 5 MB, at least 552 × 276 pixels, with aspect ratios between 3:1 and 4:5.
How many photos can you upload in a single LinkedIn post?
You can upload up to 20 photos in a post, with the layout determined by the first image.
What are the document limits for LinkedIn PDF carousels?
LinkedIn accepts PDF documents up to 100 MB and 300 pages, and asks you to flatten or merge layers before upload.
Sources: LinkedIn Help — Share photos on LinkedIn and Upload and share documents on LinkedIn, checked October 2026.