When in the awesome KidStrong program, kids rank up. When they do you buy their next shirt for $20. It’s optional, but most do as kids recognize the ranks. Here are 4 shirts my son wore when he was 4. Atlas is slightly bigger 5T. Need to do the program perhaps around 10 months to get to Altas. It’s a wonderful program to build confidence, teamwork and exercise fun. Save some money too with the shirts so you can provide yourself