We wean at 4 weeks of age. I call them weans (or weanlings) at that point. About a week to 2 weeks post weaning I called them smalls. The males of course grow generally bigger and faster than their female littermates so I usually feed them off first to avoid them over-growing our size needs. I haven't a clue quite honestly what they weigh. I just go by knowing our snakes and having a fairly decent "eye" for appropriate feeder size. Depending on the size of the litter, the quality of the mothering they got, the genetics, etc. you can see quite a lot of variance if you go purely by age.