My 9 year old son is experiencing dramatic growth spurts. It went from 9.0 to 9.5 in less than 2.5 months. I wasn't sure whether to order a 9.5 or a 10 and went for the 9.5. The shoes fit well but are a bit short in the toe area. I was going to send it back for 10 but my son liked them so much I decided against it; I know I'll buy 10 by the summer, but it won't happen again. My son is happy, so I'm happy.