The Ultimate Guide to LinkedIn Post Image Sizes: Stop Letting Bad Dimensions Ruin Your Reach

You’ve spent hours crafting the perfect LinkedIn post. The hook is sharp, the insights are data-driven, and the call to action is crisp. You upload your graphic, hit publish, and—bam. Your brilliant headline is sliced right down the middle, or your headshot is awkwardly cropped into an unrecognizable oval.

Nothing kills the momentum of a professional post faster than a poorly formatted image. Because over 60% of LinkedIn traffic flows through mobile devices, your visual content needs to be optimized, crisp, and properly proportioned.

If you want to stop guessing and start commanding attention, here is your definitive cheat sheet for LinkedIn post image sizes.

1. Single Image Feed Posts (The Big Three)

When sharing a standalone image, graphic, or photo directly to your feed, you have three primary format choices. Each serves a different psychological and spatial purpose on the screen:

| Format | Optimal Dimensions | Aspect Ratio | Best Used For |
| :— | :— | :— | :— |
| Square (The Gold Standard) | 1080 x 1080 px (or 1200 x 1200 px) | 1:1 | Infographics, quote cards, safe cross-platform sharing. |
| Portrait / Vertical (The Growth Pick) | 1080 x 1350 px | 4:5 | Mobile-first content, step-by-step visuals, high engagement. |
| Landscape (The Classic) | 1200 x 627 px | 1.91:1 | Link previews, wide landscape photography, announcements. |

• Why Square rules: If you aren’t sure what layout to use, 1080 x 1080 pixels is your safest bet. It renders cleanly on both sprawling desktop monitors and compact mobile screens without nasty auto-cropping.
• Why Portrait wins attention: Vertical images (1080 x 1350 px) occupy the most physical space on a phone screen. More screen real estate means users have to actively scroll past your content, subconsciously slowing them down and boosting your dwell time.

2. Carousel & Document Posts (PDF Slides)

Document shares (commonly known as carousels) are one of the highest-converting formats on LinkedIn for organic reach. When users swipe through your slides, consistency is everything.

• Recommended Slide Size: 1080 x 1080 px (Square) or 1080 x 1350 px (Portrait).
• File Format: Export your presentation directly as a PDF.
• Pro Tip: Keep text padding generous. Ensure your font sizes are large enough to read easily on mobile, and always keep key branding or slide numbers away from the extreme edges where LinkedIn’s UI overlays might obscure them.

3. Link Previews & Articles

When you paste a URL into a LinkedIn text box, LinkedIn automatically generates a preview card by scraping the website’s Open Graph image tags.

• Link Preview Image Size: 1200 x 627 px (Aspect ratio: 1.91:1)
• Article Feature Image: 1200 x 627 px
• The Catch: If your website’s image doesn’t match these dimensions, LinkedIn will either crop it awkwardly or fail to generate a preview thumbnail at all. Always test your links using a preview tool before launching a campaign.

4. Profile Essentials: First Impressions Matter

Your content image isn’t the only visual asset fighting for attention. Your profile page is your landing page; if your personal branding elements look pixelated, it undermines your authority.

• Profile Picture: 400 x 400 px (1:1 ratio, strictly centered face with ~60% coverage since it renders as a circle). Maximum file size is 8MB.
• Personal Banner / Cover Photo: 1584 x 396 px (4:1 ratio).
  • The Mobile Trap: Personal banners crop aggressively on mobile devices. Keep your logos, taglines, and core graphics inside a centered 1200 x 300 pixel safe zone.

Technical Specifications Checklist

Before you hit export on Canva, Figma, or Photoshop, keep these hard technical rules in mind:

• File Formats: Stick to JPEG for standard photography (smaller file size, high visual fidelity) and PNG for graphics featuring sharp text, vector logos, or transparency.
• File Size Limits: Keep single feed images under 5 MB.
• Avoid Upscaling: Never stretch a tiny image to fit 1200 pixels wide; it will introduce digital artifacts and look blurry. Always design at the native recommended resolution from the start.

Summary Takeaway: If you want a quick workflow, standardize your feed templates to 1080 x 1080 px (Square) for absolute reliability or 1080 x 1350 px (Portrait) if you want to maximize mobile thumb-stopping power. Match the dimensions to your medium, protect your safe zones, and watch your visual engagement climb.