Common working ratios
- Square: 1080 × 1080
- Portrait: 1080 × 1350
- Taller portrait: 1242 × 1656
Why 3:4 is popular
It is slightly taller than 4:5, which helps it stand out more in a vertical browsing flow. For covers and image-led post graphics, it often feels more natural.
What to watch on cover images
If the image contains a title, a product, or a person, do not judge it only at full size. The thumbnail impression matters most, so it is worth adjusting the crop yourself to keep the focus in place.