How to use this reference
Each platform page lists the recommended creative dimensions, aspect ratios, text length limits, and file requirements for the placements marketing teams use most, plus safe-zone notes for formats where platform UI overlaps the creative.
Specs drift as platforms update their products. These pages cover the stable, widely used formats and flag where values are guidelines rather than hard limits — for anything mission-critical, confirm against the platform’s official spec page before final export.
Sizes that cover almost everything
If you produce just four masters, you can adapt to nearly every placement:
| Master size | Aspect ratio | Covers |
|---|---|---|
| 1080 × 1080 | 1:1 | Feed posts and square placements on every network |
| 1200 × 628 | 1.91:1 | Link previews, landscape feed ads, Google responsive display |
| 1080 × 1350 | 4:5 | Vertical feed placements on Meta and LinkedIn mobile |
| 1080 × 1920 | 9:16 | Stories, Reels, TikTok, and YouTube Shorts |
Check exactly what survives each crop with the image crop preview tool.
Standard display banner sizes
For programmatic and Google Display Network banner inventory, these IAB-standard sizes account for the large majority of impressions:
| Size (px) | Name | Notes |
|---|---|---|
| 300 × 250 | Medium rectangle | The most widely supported size on the web |
| 728 × 90 | Leaderboard | Desktop top-of-page placement |
| 336 × 280 | Large rectangle | Strong in-content performer |
| 300 × 600 | Half page | High-visibility sidebar unit |
| 320 × 50 | Mobile leaderboard | Standard mobile banner |
| 320 × 100 | Large mobile banner | Higher-impact mobile banner |
| 160 × 600 | Wide skyscraper | Desktop sidebar |
| 970 × 250 | Billboard | Premium desktop placement |