Image dimensions Landscape: 1600 by 900 pixels (recommended) / 1024 by 512 pixels (minimum) . Image dimensions Square: 1080 by 1080 pixels. Image dimensions Portrait: 1080 x 1350 pixels. Aspect ratio: Use 2:1 or 1:1 on desktop and 2:1, 3:4, 5:4 or 16:9 on mobile.