As other reviewers mentioned, the onsie seems a little tight, but our boy is a big, long boy. The bottoms, in the other hand, are a bit loose. But all in all, when we put it on him, it was adorable! I do think one more size larger (like 24 mth) in the onsies would be a good idea for the company, since some of us are raising linebackers! Super cute outfit though, and it works for us.See full review