well, my snake is about 1/2 an inch wide as his widest point and about a foot and a halfish long, and I was wondering when I should move to the next size for his mice. Right now I'm feeding him pinkies, but the bump from the pinky goes away completly in about a day and a half. He gets down the pinkies easily, but i'm not sure if theyre to small for him yet. He's about five months old.