The Ultimate Guide to LinkedIn Post Dimensions: Master Every Format

You’ve poured hours into crafting a brilliant insight, a killer case study, or a profound thought-leadership hook. You hit publish, feeling confident—only to check your feed later and realize your custom graphic has its head cut off, your text is blurry, or your document slides look like microscopic postage stamps.

If you’ve ever wondered why your graphics look unpolished, the culprit is almost always mismatched dimensions. Because over 60% of LinkedIn traffic happens on mobile devices, sizing your visual assets correctly isn’t just about aesthetics; it’s about claiming the screen real estate necessary to stop the scroll.

This complete reference guide covers the optimal dimensions, formats, and design strategies for every single LinkedIn post type.

1. Single Image Posts: Standard Feed Graphics

Single images remain one of the most effective ways to drive engagement, but choosing the right aspect ratio depends on your content type.

| Format | Dimensions | Aspect Ratio | Best Used For |
| :— | :— | :— | :— |
| Landscape | 1200 x 627 px | 1.91:1 | Link shares, external article previews, landscape photography |
| Square | 1080 x 1080 px | 1:1 | Clean infographics, quote cards, universal multi-image grids |
| Portrait | 1080 x 1350 px | 4:5 | High-impact text graphics, data charts, maximum mobile engagement |

Pro-Tip on Portrait Mode: LinkedIn accepts aspect ratios up to 4:5 vertically. Anything taller (like an Instagram Story 9:16 format) will get awkwardly cropped by the platform. If you want maximum vertical footprint on a smartphone screen, stick strictly to 1080 x 1350 pixels.

2. Document & Carousel Posts (PDFs)

Document carousels are engagement goldmines on LinkedIn. When you upload a multi-page PDF, LinkedIn renders it as a swipeable card deck.

• Recommended Slide Dimensions: 1080 x 1080 px (Square) or 1080 x 1350 px (Portrait).
• File Type: PDF (Recommended), PPT, PPTX, DOC, or DOCX.
• File Limits: Maximum 100 MB and up to 300 pages. (Though for carousels, 6 to 10 slides is the sweet spot for completion rates).

Crucial Design Rule: Never upload landscape slides (like traditional 16:9 presentation decks). While LinkedIn will accept them, they scale down aggressively on mobile, rendering your text unreadable.

3. Video Posts

Video continues to grow as a primary medium for building trust and personal brand authority on the platform.

• Landscape (Widescreen): 1920 x 1080 px (16:9 ratio)
• Square: 1080 x 1080 px (1:1 ratio)
• Vertical/Portrait: 1080 x 1350 px or 1080 x 1920 px (4:5 or 9:16 ratio)
• Technical Constraints:
  • Maximum file size: 5 GB
  • Length: 3 seconds to 10 minutes (organic)
  • Format: MP4 (H.264 codec recommended)

4. Profile Infrastructure: Banners & Avatars

Your posts capture attention, but your profile page converts casual readers into followers, clients, or employers. Make sure your profile assets aren’t misaligned:

• Profile Picture (Avatar): 400 x 400 px minimum (1:1 ratio, max 8 MB). Remember that LinkedIn displays avatars as a circle, so keep your face and focal points centered. Avoid transparent PNGs, as LinkedIn fills transparency with an unflattering gray background.
• Personal Profile Background Banner: 1584 x 396 px (4:1 ratio, max 8 MB). Keep in mind that your profile picture overlaps the bottom-left corner on desktop and mobile, so don’t put crucial text or logos there.
• Company Page Cover Image: 1128 x 191 px (5.9:1 ratio). Note: Company covers are much shorter than personal banners. Do not try to use the exact same file for both, or your company cover text will be severely cropped.

Summary Checklist Before You Publish

1. Design for Mobile First: Assume over half of your audience is looking at your graphic on a smartphone. If text looks too small on your desktop monitor at 100% zoom, it’s too small for a phone.
2. Stick to Standard Ratios: Use 1:1 for safe, universal layouts, and 4:5 (1080 x 1350 px) when you want to maximize vertical screen presence.
3. Keep Margins Clean: Leave a safe padding border (at least 80–100 pixels) around text-heavy carousel slides or graphics so your copy doesn’t bleed right up to the edge.

By standardizing your workflow around these dimensions, you ensure your content always looks sharp, professional, and optimized for maximum reach.