Small baby fits 2 + 1/4" wide palm 1+1/2 ozs baby sport yarn and F crochet
hook. 9 sc = 2"; 9 sc rows = 2".
Medium fits 2 + 1/2" wide palm 2 ozs worsted weight yarn and G hook.
4 sc = 1"; 4 sc rows = 1".
Large fits 3 + 1/2" wide palm 2 +1/2 ozs chunky weight yarn and I hook.
3 sc = 1"; 3 sc rows = 1"