LinkedIn Post Dimensions: Complete Size Guide

Getting your visuals right on LinkedIn is the difference between a post that stops the scroll and one that gets completely ignored. Because over 60% of LinkedIn traffic originates from mobile devices, the platform’s algorithm and layout heavily favor vertical and square formats that occupy maximum screen real estate.

1. Single Image Posts

Single images are the backbone of everyday LinkedIn publishing, whether you are sharing infographics, photography, or event announcements.

• Portrait (4:5 Ratio) — Recommended: 1080 × 1350 pixels. This is the golden standard for maximum engagement. It commands the most vertical space on mobile feeds, forcing users to pause longer as they scroll.
• Square (1:1 Ratio): 1080 × 1080 pixels. A reliable, safe option that renders uniformly across desktop and mobile screens without risking awkward auto-cropping.
• Landscape (1.91:1 Ratio): 1200 × 627 pixels. Ideal for link previews and formal announcements, though it takes up significantly less room on mobile.
• File Limits: Keep individual image file sizes under 5 MB. Accepted formats include JPG, PNG, and WebP.

2. Document Carousels (PDF Slide Decks)

Document carousels remain one of the most effective organic reach tools on LinkedIn, perfect for deep dives, step-by-step guides, and frameworks.

• Recommended Slide Size (Portrait): 1080 × 1350 pixels (4:5 aspect ratio).
• Alternative Slide Size (Square): 1080 × 1080 pixels (1:1 aspect ratio).
• Technical Specs: Upload your deck as a PDF (though PPTX and DOCX are technically accepted, PDF prevents formatting shifts). Ensure body text is at least 24pt so it remains effortlessly readable on smaller phone screens. Maximum file size is 100 MB (up to 300 pages).

3. Native Video Posts

Native video uploads drastically outperform external video links because LinkedIn keeps users inside its app feed.

• Vertical (9:16 Ratio): 1080 × 1920 pixels. Perfect for Reels-style talking-head clips and high-retention mobile viewing.
• Square (1:1 Ratio): 1080 × 1080 pixels. A balanced choice for feed-friendly thumbnails.
• Landscape (16:9 Ratio): 1920 × 1080 pixels. Best suited for formal widescreen product demos and webinar snippets.
• Technical Specs: Accepted formats include MP4 and MOV up to 5 GB. Keep video lengths appropriate to your content, though short-form clips under 60 seconds generally maximize completion rates.

4. Profile and Company Branding Assets

Do not let poorly cropped profile assets undermine your content authority. Ensure your foundational branding matches these pixel targets:

• Personal Profile Photo: 400 × 400 pixels (1:1 aspect ratio; displays within a circular crop, so keep your face centered).
• Personal Background Banner: 1584 × 396 pixels (4:1 aspect ratio).
• Company Page Logo: 300 × 300 pixels (1:1 aspect ratio).
• Company Page Banner: 1128 × 191 pixels (~5.9:1 aspect ratio).

Quick Summary Checklist

| Content Format | Ideal Dimensions (Pixels) | Aspect Ratio | Max File Size |
| :— | :— | :— | :— |
| Feed Post (Portrait) | 1080 × 1350 | 4:5 | 5 MB |
| Feed Post (Square) | 1080 × 1080 | 1:1 | 5 MB |
| Document Carousel | 1080 × 1350 | 4:5 | 100 MB (PDF) |
| Vertical Video | 1080 × 1920 | 9:16 | 5 GB |
| Widescreen Video | 1920 × 1080 | 16:9 | 5 GB |

By building your assets around a mobile-first 4:5 portrait baseline wherever possible, you secure maximum visual dominance in the feed and set your content up for peak engagement.