Well, our boys have been moving up in sizes. Will is mostly wearing 5T now. He is a very tall boy. He wears 10 1/2 or 11 shoe sizes. Drew is now in 3T and wears size 8 shoes. Luke is in 12-18 mos. clothing and wears a ?size 4 shoe. Wow! I also have discovered that Luke needs to move to a size 4 diaper since he keeps having huge blow-outs every day, involving baths and changes of bedding several times a day.