feeding size

Hello, Ive had my ball python for almost a year now. Hes about 2 feet long and lively and healthy and everything is good. I do not have a scale at the moment to see his weight. I was talking to a breeder an she said he can def. eat a small rat. Ive been feeding him 2 adult mice once a week and he takes them like a champ and seems still hungry but when i go to the pet store to get a rat it seems like theyre too big. Im scared to feed him to big of a meal but everyone says hell take it. at 2 feet do you think hes big enough for a small rat? I keep thinking its too big. if you need pictures next to something to see the thickness of him or length i can do my best.

He should be ready for a small rat. My peid and one of my females are 700 grams and they both will eat a small rat. The female will eat 2 if I would let her.

The rat should be as big around as the WIDEST part of the snake's body. If it is, then it's exactly the right size.

What if its just a tad bit bigger. dont they size up their food? and if they do theyll know what to eat and everything right?