I bought this online because our local stores did not have the right size for my son.  It's what I expected from a costume of this type... except for the sizing.  My son is 4, but wears a 3T.  I thought the US size 2-4 would be fine, but it was a very odd fit.  A little long in the sleeves, and VERY SHORT in the torso and legs.  Like highwater short.  I'd say this is comparable to a US size 2.  Other than the size, it worked out well. He didn't care about the short legs, and has continued to wear it around the house since Halloween. The moustache is very big, and we ended up not using it (eyeliner to the rescue).