I bought 4t_5t for my 3 and a half year old, and they fit great. But he is a very tall noodle, on the slim fit/skinny side. If your child is on the chunky side I can it fitting very snuggle. And I got the dinosaurs when I chose the Football, but he didn't care, they fit very comfortable on him and he even has some room to grow. No tags, no thick seams, and he really likes them.