Yeah, that's what I thought, but was wondering what weight everyone else stops using that "rule". Mine has been on smalls for a while now. He is around 625-650 grams currently, and the rats that I ordered last time ranged from 53-94 grams, and I still had a few wean rats left (44-50g).

I feed the smallest first so I don't waste any. The 75-90 gram rats still look much wider than his widest point, though I admit that I still find it hard to measure his food that way (especially since the rats are frozen and kind of flat). I've been feeding every 5 days since he was being offered things less than 8% of his body weight, planned on switching every 7-10 days when he eats things around 8-10% of his body weight, I have never felt the need to feed more than 10% of his weight... Luckily he finished all the weaned rats last week and went into shed again, so he'll be on the smaller smalls for a while. By the time I get to feeding the 75+ gram rats he will be very capable of handling them (I probably baby him and worry about prey size a little too much too)