The safest LinkedIn post specs for 2026 are: square images at 1200 x 1200 px, vertical images at 1080 x 1350 px, link previews at 1200 x 627 px, and concise text that works before the "see more" break.
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LinkedIn post size cheat sheet
| Format | Recommended size | Aspect ratio | Notes |
|---|---|---|---|
| Square image post | 1200 x 1200 px | 1:1 | Reliable feed format |
| Vertical image post | 1080 x 1350 px | 4:5 | Strong mobile feed presence |
| Landscape image post | 1200 x 627 px | 1.91:1 | Good for links and wide graphics |
| Link preview | 1200 x 627 px | 1.91:1 | Best for blog/article links |
| Carousel/document | 1080 x 1350 px pages | 4:5 | Upload as PDF when using document posts |
| Native video | 9:16, 1:1, or 16:9 | Varies | Keep key text away from edges |
| Post text | Up to about 3,000 characters | n/a | Put the hook in the first lines |
Best image size for a LinkedIn post
Use 1200 x 1200 px when you want the safest all-purpose image size. Use 1080 x 1350 px when you want more vertical space in the mobile feed. Use 1200 x 627 px for link-style graphics, wide images, and article previews.
LinkedIn carousel and video specs
For carousels, design document pages at 1080 x 1350 px or 1080 x 1080 px. For native video, use vertical 9:16, square 1:1, or horizontal 16:9 based on the asset.
LinkedIn post text specs
Put the hook, claim, or useful takeaway in the first few lines. Use short paragraphs and avoid huge blocks of text.
How PostOnce fits LinkedIn specs
PostOnce is useful when LinkedIn is one destination in a larger distribution workflow. PostOnce is useful when the bottleneck is social distribution: automated crossposting, repurposing existing content, rules and filters, supported platforms including Instagram, X/Twitter, LinkedIn, Bluesky, Threads, Facebook, Pinterest, and YouTube, Creator at $19/month, Pro at $49/month, a 7-day trial, 50,000+ posts processed, and native-post-triggered distribution.
FAQ
What size should a LinkedIn post image be?
Use 1200 x 1200 px for square posts, 1080 x 1350 px for vertical posts, and 1200 x 627 px for link previews or landscape images.
Can I post 1080 x 1350 on LinkedIn?
Yes. 1080 x 1350 is a practical vertical format for LinkedIn feed posts and carousel/document pages.