The Ultimate Guide to LinkedIn Post Dimensions and Image Sizes

Whether you are building a personal brand or running multi-channel campaigns for a global enterprise, visual content is the primary driver of engagement on LinkedIn. However, there is nothing more frustrating than crafting a brilliant thought-leadership post, attaching a custom graphic, and watching it get awkwardly cropped, pixelated, or cut off by the platform’s layout engine.

Because over 60% of LinkedIn traffic originates from mobile devices, understanding exact aspect ratios and pixel dimensions is non-negotiable. This comprehensive guide breaks down every crucial LinkedIn post dimension you need to keep your content looking crisp, professional, and optimized for maximum reach.

1. Single Image Feed Posts

Single image posts are the bread and butter of LinkedIn content. Depending on the visual narrative you want to push, you can choose from three primary orientations:

• Square (1:1 Aspect Ratio) — Recommended: $1200 times 1200$ pixels (or $1080 times 1080$ px)
  • Best for: Infographics, quote cards, and general announcements.
  • Why use it: Square is the ultimate “safe bet.” It renders consistently across both desktop monitors and mobile feeds without unexpected cropping, taking up significantly more visual estate than horizontal formats.
• Portrait / Vertical (4:5 Aspect Ratio) — Recommended: $1080 times 1350$ pixels
  • Best for: High-performing thought leadership graphics, step-by-step breakdowns, and mobile optimization.
  • Why use it: Portrait posts command the most vertical space on mobile phone screens. More screen real estate translates directly to prolonged view times and higher interaction rates.
• Landscape (1.91:1 Aspect Ratio) — Recommended: $1200 times 627$ pixels
  • Best for: Link previews, landscape photography, or broad banner-style visuals.
  • Why use it: While ideal when sharing external website links (as it populates the native link preview thumbnail), it leaves considerable empty space on vertical mobile screens.

File Constraints for Images: Keep individual photo uploads under 5 MB. Supported formats include JPEG, PNG, and WebP.

2. Carousel & Document Posts (PDFs)

Carousel posts—created by uploading a multi-page PDF document that users can swipe through—are among the highest-converting formats on LinkedIn for organic reach.

• Recommended Dimensions: $1080 times 1080$ pixels (Square) or $1080 times 1350$ pixels (Portrait) per slide.
• File Format: PDF, PPTX, or DOCX (PDF is heavily recommended to preserve exact formatting).
• File Size Limit: Up to 100 MB (with a generous ceiling of up to 300 pages, though 5 to 10 slides is the sweet spot for engagement).

3. Video Post Specifications

Native video content continues to capture high attention spans. LinkedIn supports multiple orientations, though vertical and square formats win on mobile.

| Video Type | Recommended Resolution | Aspect Ratio | Max File Size | Max Duration |
| :— | :— | :— | :— | :— |
| Square | $1080 times 1080$ px | 1:1 | 5 GB | 10 minutes |
| Portrait / Vertical | $1080 times 1920$ px | 9:16 | 5 GB | 10 minutes |
| Landscape / Widescreen | $1920 times 1080$ px | 16:9 | 5 GB | 10 minutes |

Tip: Stick to MP4 files encoded with H.264 video codec and AAC audio for seamless playback across all platforms.

4. Profile and Company Page Essentials

Your personal profile and company hub act as your landing page. If your graphics are blurry or improperly aligned, you risk losing credibility before a prospect even reads your posts.

• Personal Profile Photo: $400 times 400$ pixels (1:1 ratio; remember that LinkedIn crops this into a circle, so keep your face tightly centered and clear of corners). Max size: 8 MB.
• Personal Cover Banner: $1584 times 396$ pixels (4:1 aspect ratio).
• Company Page Logo: $400 times 400$ pixels minimum.
• Company Page Cover Banner: $1128 times 191$ pixels (note that this is much flatter than a personal banner, so avoid cramming heavy text or detailed graphics into it).

Quick-Check Best Practices for Designers

1. Design for Mobile First: Because the vast majority of your audience views content on their phones, avoid tiny text sizes (keep fonts inside images at a minimum of 24px) and keep vital details away from outer borders.
2. Choose the Right Format: Use PNG for sharp graphics, clean UI mockups, and text-heavy images. Use JPEG for photographs to keep file sizes optimized and fast-loading.
3. Double-Check Preview Modes: Always use desktop and mobile preview checks before pushing your final content live to ensure no critical headers or call-to-actions are clipped.