I just ran outside to take the garbage out....DS's flip-flops were by the door and for some reason I slipped them on and they fit! I wear a size 10 1/2 in womens (I have big feet myself) DS is 6! His shoes fit me! He wears a size 6 now....granted the flip-flops are a little big on him, but not much. I can't wait to see his feet when he's 15! How big our your DS's feet?