Here's an approximation of my feeding:

<150 grams until they can handle rat pups - 8-11 gram mouse hoppers (occasionally twice a week)
<600 grams - 20-29 gram rat pups
>600 grams but less than 1100 grams - 30-49 gram weanlings (sometimes still pups - depending on the snake)
>1100 grams - 50-89 gram small rats
>1500 grams - 50-89 gram small rats approx every 10 days

I got my weight estimates from the rodent breeder website I got my last batch of frozens from. My more "slender" snakes I keep on the smaller size prey item for a longer period of time, until they are enough of a pork chop to size up. Anyway, you get the picture.

Unless otherwise noted, they are on a weekly schedule.