I'm 5'4, wear a size 8. The medium size that fits perfectly. The fabric of the costume is comfortable and elastic could give it 5 stars, but only gave it 4 stars because the suit came broken and the mask is very small (I'll need to buy another mask). I can not deny, my husband was fascinated!!!. If you do not want to walk too discovered, buy a green cap for $ 10 (that's what I did.