HiResCovers.net

I am new to making covers and am using Microsoft paint to tinker with some covers.
I want to get movie poster images on the Internet and format them to fit a blu Ray cover without messing up the image ratio.
Can anyone tell me what size to make the front image of the cover in pixels? That seems to ...

hi there,
just signed up here!
I am mainly looking for some marvel. Disney and Pixar covers that have a unifying cover and spine style. Thanks!