Quote Originally Posted by stickyalvinroll View Post
Feed every 5 to 7 days. The size of prey should be a little bigger than the biggest part of the snakes body.

I wouldn't say bigger... the general rule is to the size of the largest part of their body, or 10-15% of their body weight.
Other species can eat things larger than their bodies, but typically it is not suggested for ball pythons. They have slower metabolisms than other species.