Where 4:5 is used
4:5 is slightly taller than square. It is the tallest shape Instagram shows in the main feed without cropping. Typical uses: Instagram and Facebook portrait feed posts and portrait ads.
Common 4:5 resolutions
| Width × height | Name |
|---|---|
| 864 × 1080 px | Small portrait |
| 1080 × 1350 px | Instagram portrait post |
| 1440 × 1800 px | Large portrait |
| 1536 × 1920 px | 1920 tall |
How to calculate 4:5 dimensions
Height = width × 5 ÷ 4. Width = height × 4 ÷ 5. Round to whole pixels; many video encoders also need even numbers.
CSS for a 4:5 box
.media { aspect-ratio: 4 / 5; width: 100%; }