http://www.thereddragonsden.com/avgweight.htm This link is to a site where a bloke took average weights of his 15 baby ball pythons from birth. So make what you will of it, it is an average, so some will weigh more, some will weight less. Don't read too much into it, if there was a big difference then maybe it is something to worry about. This is a very small difference so don't worry.