I bought this for my tall (40"), skinny (30 lbs) three year-old.  It's very short on her and baggy all around.  She can still wear it, but the elephant toes hit her mid-calf and if I snap the hood onto the torso it pulls.  The sizing confused me when I ordered it, so I hope this is helpful to someone else.  Also, the material is very THIN so if your kid is going to wear this outside in the fall/winter, you'd have to layer other clothes underneath it.  As an inside-only dress up outfit, it works fine.  There are snaps up the back though, so a small child cannot get this on and off by herself (which is a pain for dress-up clothes).