iTunes Music Artist Front Page Banner Images Sizes or Guidelines

Hello! We are a small design studio and we are developing the new single artwork for a major artist. We want to be sure to have all image sizes prepared for this release. Is there an iTunes Music Artwork Guidelines that is really complete so we can make all these artworks? Mainly what I want is to have iTunes Front Page featured release banners, iTunes Album Page headers and all kind of image sizes that are used throughout the music platform.

Thanks in advance!