Are they the right size?

[AK907]

It's a bad picture, she is one year and three months old and if a six month old ball python can be 600 grams I know for fact she is more than 500 grams. I'll post some better pictures here shortly and you'll see she's much bigger than she looks in the first pictures

Yeah, a better pic would help, I am just going by what I can see. They look pretty good, though.

A 6 month old can be 600 grams, but a year and half old can also be 300 grams. We have some 5 month old balls that are well on their way to being 450-500 grams at 6 months with proper feeding. Likewise, last year we picked up a year and a half old female ball that only weighed a little over 300 grams.