| Ratio | Example | Typical use |
|---|---|---|
| 1:1 | 1080×1080 | square / icons / social |
| 4:3 | 1600×1200 | classic display / photo |
| 3:2 | 1800×1200 | camera photo |
| 16:9 | 1920×1080 | video / widescreen |
| 9:16 | 1080×1920 | vertical video / stories |
| 21:9 | 2560×1080 | ultrawide |
| A-series | 1:√2 ≈ 1:1.414 | ISO paper proportion |
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Sources & update policy
Verified: 2026-08-31. This page prioritizes primary standards and official registries. Time-sensitive items should be rechecked against the linked source.