While this onsie is the correct length for Americans, the sizing is still way off. There is NO way this is a true size 10 to 12. I'm a size FIVE and this doesn't have much room in the waist. I ordered up hoping for a really large onsie with plenty of room! Now I'm scared to wash it. If it shrinks at all it will be tight. And I'm a true size 5 (rarely a six) depending on jean manufacturer. I don't want to return it since I can't find another onesie maker who isn't overseas and makes them sized for an Asian market (shorter people). But I would not buy again, unless I ordered up a full two sizes at least. Pretty disappointed!!! On the plus side, the material is nice and thick, and the length is correct for me (I'm 5'5).

Pros; appears well made, correct length, good material.
Cons; horribly narrow in the waist, might shrink with washing