1. LinkedIn Aspect Ratios at a Glance
Choosing the right dimensions for your LinkedIn infographic determines how much physical screen space your post occupies in the mobile feed.
Here is the quick specification cheat sheet:
| Format Shape | Aspect Ratio | Optimal Pixel Dimensions | Primary Best Use Case |
|---|---|---|---|
| Vertical Portrait (Recommended) | 4:5 | 1080 × 1350 px | Most infographics, checklists, and 4-quadrant frameworks |
| Square | 1:1 | 1080 × 1080 px | Simple quote cards, short stats, and single statements |
| Long Cheat Sheet | 2:3 | 1080 × 1620 px | Dense 9-row cheat sheets and vertical directory lists |
| Stories / Full Screen | 9:16 | 1080 × 1920 px | Cross-posting to Instagram, TikTok, or mobile stories |
2. Why 4:5 Portrait Is the Best LinkedIn Infographic Size
More than **78% of all LinkedIn impressions** happen on mobile devices.
A standard 1:1 square image leaves significant blank space above and below the card. In contrast, a **4:5 portrait graphic (1080 × 1350 px)** extends vertically down the screen.
Key benefits of 4:5 portrait:
- **25% More Vertical Feed Space:** Pushes competing posts below the fold so the reader cannot be distracted by the next update.
- **Larger Readable Fonts:** Allows you to use 18-24px equivalent typography that reads effortlessly without zooming.
- **Zero Awkward Crop:** Fits natively inside LinkedIn's standard image container without gray letterboxing.
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3. When to Use 1:1 Square (1080 × 1080 px)
While 4:5 dominates mobile feeds, 1:1 square graphics have a distinct role:
- **Quote Cards:** A headshot, a name badge, and a punchy 2-line quote look clean and uncluttered in a square format.
- **Minimalist Stat Grids:** Highlighting a single percentage or metric (*"73% of B2B buyers..."*) works best with balanced square margins.
- **Desktop Feed Symmetry:** If your target audience consists of enterprise desktop users during corporate working hours, 1:1 renders with perfect 100% fidelity on desktop web browsers.
4. When to Use 2:3 Tall (1080 × 1620 px)
2:3 tall graphics are specifically designed for high-density cheat sheets and resource directories with 8 or more rows.
When posted on LinkedIn, a 2:3 graphic displays cleanly with a slight vertical expansion indicator. Because the preview looks dense and comprehensive, users naturally tap the image to open the full-screen view—triggering positive engagement dwell-time signals to the algorithm.
5. Resolution, Margins, and Compression Best Practices
To ensure your infographic looks razor-sharp after LinkedIn applies its image compression, follow these rules:
1. **Always Export as PNG:** Avoid JPEG for graphics containing text. JPEG creates fuzzy compression artifacts around letters, while PNG retains crisp vector-sharp edges.
2. **Keep Safe Margins (40px padding):** Never place essential text within 40 pixels of any image edge to prevent accidental cropping on varied Android/iOS screens.
3. **High Contrast Backgrounds:** Avoid pale gray text on white backgrounds. Use deep navy, midnight black, or bold brand accents with 4.5:1 contrast ratios.
About the Author
GrowthMaster Design Lab — Platform UX & Visual Standards
Benchmarking aspect ratios, pixel density, and mobile feed viewports to maximize visual click-through rates.
Frequently Asked Questions
Yes. In the GrowthMaster Infographic Maker, you can switch between 4:5, 1:1, 2:3, and 9:16 with a single click, and all elements adjust automatically.
