Aspect Ratio
The proportional relationship between an image's width and height, expressed as a ratio like 16:9 or 4:3.
Aspect ratio determines the shape of an image. Common ratios include 1:1 (square, used for product listings and profile photos), 4:3 (standard photos), 16:9 (widescreen and social media), and 3:2 (35mm film standard). Different platforms prefer different ratios, and AI tools like outpainting can extend images to fit new aspect ratios without cropping.