Something square - recommended size is 200x200 pixels and less than 500kb in size.
Must be in a 16:9 ratio (1600x900 pixels minimum, most desktop backgrounds will work well) and must be less than 500kb in size.
If you have any questions or problems changing your profile picture or offline banner, let us know and we can try and help you out :)
(Include your username and the image you are trying to use if possible)
If you choose a profile picture or offline cover that is inappropriate, it will be removed or replaced with cat pictures.