Rat sizes

I have a ball python that I have been feeding 3" adult mice...what should I start feeding her now? (weaned, small, medium, etc.) Thanks

More info would be helpful. How old is your snake? How big? How long has she been eating 3" mice? Will she take multiple mice for a single meal?

She's probably 18 months old and almost 3' long. I've been feeding her 3" ones since I had her (1 year). I've never tried multible feedings.

If she's almost 3' then you should be able to feed her small rats, but I wouldn't jump directly from one to the other. I'd give her a couple of feedings of rat fuzzies or weanlings, then a couple feedings a little bigger, and then go to the small rats.