The Definitive Guide to LinkedIn Post Dimensions

When it comes to building an audience or driving B2B leads on LinkedIn, your design quality doesn’t matter if your dimensions are wrong.

An incorrectly cropped graphic or a pixelated video thumbnail can instantly undermine your professional credibility. More importantly, the LinkedIn algorithm favors content that respects native platform parameters. Because over 60% of LinkedIn traffic originates on mobile devices, understanding how vertical, square, and horizontal assets scale on a smartphone screen is the difference between being scrolled past and stopping the scroll.

This guide breaks down the precise, up-to-date dimensions for every asset type on LinkedIn so your content always renders with crisp, professional polish.

1. Single Image Posts

Single images remain a core staple for infographics, stat callouts, and personal photo posts. Choosing the right aspect ratio changes how much real estate your post occupies in the feed.

| Orientation | Recommended Dimensions | Aspect Ratio | Best Used For |
| :— | :— | :— | :— |
| Portrait (Vertical) | 1080 × 1350 px | 4:5 | Infographics, mobile-first storytelling, high-impact text graphics |
| Square | 1200 × 1200 px (or 1080 × 1080 px) | 1:1 | Clean layouts, balanced display across desktop and mobile |
| Landscape | 1200 × 627 px | 1.91:1 | Link previews, news articles, panoramic photography |

• Pro Tip for Portrait: The 4:5 aspect ratio (1080 × 1350 px) is the power-user choice. It pushes the boundary of what LinkedIn displays fully in the mobile feed without vertical cropping, capturing maximum visual attention.
• File limits: Keep single image file sizes under 5 MB. Formats accepted include JPG, PNG, and non-animated GIF.

2. Document Carousels (PDF Slide Decks)

Document carousels—uploaded as multi-page PDFs—consistently rank among the highest-performing organic reach formats on LinkedIn.

• Recommended Slide Size: 1080 × 1350 px (Portrait, 4:5 ratio) or 1080 × 1080 px (Square, 1:1 ratio).
• File Format: PDF (preferred).
• Technical Limits: Maximum file size of 100 MB and up to 300 pages (though 5 to 10 slides is the sweet spot for reader retention).

Design Note: When designing carousels in tools like Canva or Figma, export your slides directly as a high-resolution PDF. Ensure body text sits at a minimum of 24pt so it remains effortlessly readable on mobile devices.

3. Video Specifications

With the expansion of LinkedIn’s dedicated vertical video capabilities, native video has become a vital component for creator and brand growth.

• Vertical Video (Reels-style): 1080 × 1920 px (9:16 aspect ratio) — Ideal for maximum mobile feed dominance.
• Square Video: 1080 × 1080 px (1:1 aspect ratio) — A versatile format that doesn’t crop aggressively on either desktop or mobile.
• Landscape Video: 1920 × 1080 px (16:9 aspect ratio) — Perfect for desktop-first webinars, talking-head recordings, and horizontal screen shares.
• Technical Constraints:
  • Duration: 3 seconds to 10 minutes.
  • Maximum File Size: Up to 5 GB (though staying under 200 MB helps speed up native rendering).
  • Formats: MP4, MOV, ASF, AVI, and others (MP4 recommended).

4. Profile & Company Page Assets

Your profile elements frame your personal brand or business identity before a prospect even reads your posts.

• Personal Profile Picture: 400 × 400 px minimum (1:1 aspect ratio, displayed within a circular mask; keep your face tightly centered). Max file size: 8 MB.
• Personal Background Banner: 1584 × 396 px (4:1 aspect ratio). Max file size: 8 MB.
  • Safe Zone: Keep text and visual branding in the center; mobile viewports crop the extreme left and right sides of personal banners.
• Company Page Logo: 300 × 300 px (1:1 square, ideally uploaded as a transparent PNG).
• Company Page Cover Banner: 1128 × 191 px ( roughly 6:1 aspect ratio).

Summary Checklist for Creators

Before you hit publish on your next campaign, run through this quick sanity check:

1. Are you posting an infographic or checklist? Use 1080 × 1350 px portrait to occupy maximum screen space.
2. Are you sharing a quick update or poll graphic? Stick to 1080 × 1080 px square for universal compatibility.
3. Are you uploading a document carousel? Save it as a clean PDF at 4:5 or 1:1 dimensions.

Getting these baseline dimensions right ensures your content looks sharp, professional, and optimized for the modern algorithm.