"My son is only 21 months old but after reading the reviews, I got him the 2-4T size, which sounded like it would fit up to a child who wears 3T. NOPE...my son is not even 2 yet and it's too short on him and he is average sized. The costume is incredibly cute, very soft and the details are fun...but I think it's ridiculous that the sizing is this far off."