LinkedIn Post Image Size Guide for 2026: Dimensions

Mastering the LinkedIn Post Image Size: The Ultimate Guide

When you spend hours crafting the perfect professional insight or thought-leadership piece, the last thing you want is for a pixelated or awkwardly cropped image to ruin your first impression. On social media, visuals act as the stop-sign for the scrolling thumb. If your dimensions are off, LinkedIn’s auto-crop will step in—and it rarely makes a flattering choice.

Getting your graphic dimensions right ensures your content looks professional, clean, and intentional. Here is your definitive guide to LinkedIn post image sizes, ratios, and best practices to maximize your reach.

1. Single Image Posts: Choose Your Format

Depending on what you are trying to share, you have three primary aspect ratios for single image posts. Because a massive chunk of LinkedIn traffic happens on mobile devices, matching your image to the right layout can drastically impact your visibility.

• Square (1:1 Ratio) — 1080 x 1080 pixels
  • Best for: Infographics, quote cards, and general brand updates.
  • Why use it: It’s the safest, most versatile choice. Square images render consistently and cleanly across both desktop monitors and smartphone screens without unpleasant surprises.
• Portrait / Vertical (4:5 Ratio) — 1080 x 1350 pixels
  • Best for: Deep-dive infographics, photography, and high-engagement thought leadership.
  • Why use it: Vertical images command the most screen real estate on mobile feeds. More screen space means higher attention spans and better overall engagement.
• Landscape (1.91:1 Ratio) — 1200 x 627 pixels
  • Best for: Link previews, blog headers, and wide-format photography.
  • Why use it: It is LinkedIn’s traditional format. However, because it is wide and short, it takes up the least amount of vertical space on mobile feeds. Use this primarily when sharing external links where the thumbnail is supplementary.

2. Carousel & Document Posts (PDFs)

Carousels (uploaded as document PDFs) are one of the highest-performing content formats on LinkedIn. To keep your slides from looking disjointed, every slide must share the exact same dimensions.

• Recommended Size: 1080 x 1080 pixels (Square) or 1080 x 1350 pixels (Portrait)
• File Format: PDF, PPTX, or DOCX (PDF is heavily preferred for crisp typography).
• Pro-Tip: Avoid mixing aspect ratios (