Image sizes

If I want to make a good looking grid of images, having images in the same proportions is nice. Is there anything like this in this api? Any size-guidelines for screenshots/covers? There are two or three square images provided, but they are really, really small (avatar and mini)

This is not official data but I have been using the API for a few days now and these seem to be the dimensions in pixels of the different image results returned by the API:

• icon_url: 80 x 80
• medium_url: variable x 960
• screen_url: 480 x 270
• small_url: variable x 640
• super_url: variable x variable
• thumb_url: variable x 160
• tiny_url: 30 x 30