The Ultimate Guide to LinkedIn Post Dimensions: Master Your Visual Impact

Whether you are building a personal brand as an industry thought leader or scaling a corporate presence, LinkedIn has evolved far beyond a digital resume repository. Today, it is a bustling visual ecosystem. With over half of its traffic originating from mobile devices, how your content is rendered can make or break your engagement rate.

An abruptly cropped graphic or a pixelated video signals a lack of polish, while a crisp, perfectly proportioned visual stops the scroll. This comprehensive guide breaks down the optimal LinkedIn post dimensions to maximize your reach and protect your brand’s aesthetic.

1. Single Image Posts: Choose Your Ratio

When uploading a single image to the LinkedIn feed, you have three primary orientation options. Each serves a distinct purpose depending on your content goals:

• Portrait (1080 × 1350 pixels | 4:5 Aspect Ratio)
  • Best for: Maximizing feed estate on mobile devices, deep storytelling, and infographics.
  • Why use it: Portrait images take up the most vertical space on a smartphone screen, forcing users to pause longer as they scroll. This format is widely favored by top creators for high-impact text-heavy graphics.
• Square (1080 × 1080 pixels | 1:1 Aspect Ratio)
  • Best for: Clean quote cards, product shots, and balanced grid layouts.
  • Why use it: Square is the ultimate “safe” format. It renders predictably and attractively across both desktop monitors and mobile screens without unexpected edge cropping.
• Landscape (1200 × 627 pixels | 1.91:1 Aspect Ratio)
  • Best for: Link previews, landscape photography, and corporate announcements.
  • Why use it: This is LinkedIn’s classic horizontal dimension. While it offers less vertical dominance on mobile feeds, it remains the golden standard for sharing external website links and press releases.

Pro Tip: Keep file sizes under 5MB and utilize PNG for graphics with crisp text or logos, and JPEG / WebP for photographic content.

2. Document & Carousel Posts (PDF Slides)

Document uploads—commonly referred to as carousels or slide decks—are among the highest-performing content formats on LinkedIn. When users swipe through a multi-page PDF, layout consistency is paramount.

• Recommended Dimensions:
  • Square: 1080 × 1080 pixels (1:1 ratio)
  • Portrait: 1080 × 1350 pixels (4:5 ratio)
• File Constraints: Save your design directly as a high-quality PDF (up to 100MB, though individual slide limits or general optimization apply).
• Design Rule of Thumb: Stick to a uniform aspect ratio across all slides. Mixing landscape and portrait slides in a single document causes awkward resizing behavior in the viewer.

3. Video Specifications

Video content commands immense attention in professional feeds, but uploading a file with the wrong aspect ratio can lead to unsightly black bars or automatic cropping.

• Landscape Video: 1920 × 1080 pixels (16:9 ratio)
• Square Video: 1080 × 1080 pixels (1:1 ratio)
• Vertical Video: 1080 × 1350 pixels (4:5 ratio) or 1080 × 1920 pixels (9:16 ratio)
• Technical Limits: Resolution ranges from 360p up to 4K (720p or 1080p recommended for smooth performance). File sizes can scale up to 200MB, with lengths ranging from 3 seconds to 10–15 minutes.

4. Profile & Company Page Branding Baseline

Beyond individual posts, your ongoing authority relies on a cohesive profile aesthetic. Ensure your foundational real estate is sized correctly:

| Asset Type | Optimal Dimensions | Aspect Ratio | Format Notes |
| :— | :— | :— | :— |
| Personal Profile Photo | 400 × 400 px | 1:1 | Displayed as a circle; keep your face centered. |
| Personal Cover Banner | 1584 × 396 px | 4:1 | Watch out for mobile side-cropping. |
| Company Page Logo | 400 × 400 px | 1:1 | Minimum 268 × 268 px. |
| Company Page Cover | 1128 × 191 px (up to 4200 × 700 px) | ~5.9:1 | Test visibility across both desktop and mobile layouts. |

Quick Summary Cheat Sheet

If you are designing assets on the fly, remember these magic numbers:

• For maximum mobile feed presence: Use 1080 × 1350 pixels (Portrait).
• For versatile, safe formatting: Use 1080 × 1080 pixels (Square).
• For link shares and web previews: Use 1200 × 627 pixels (Landscape).

By designing to these precise specifications, you ensure your professional insights look sharp, intentional, and optimized to capture attention the second a user scrolls past.