I'm finally getting around to reviewing this after 2 years of use... Even though this suit fits very big, it wins me over! I bought the 18-24 mo size for my 12-18 mo clothes size daughter. I wanted it a little big so I could layer clothes underneath. She wasn't walking at that age (just under a year) for the first winter she wore this suit which worked out great because it was pretty long in the legs and arms. However, I didn't mind because she wasn't walking and I wanted to put the feet and hand covers over her anyways. It kept her nice and warm and she loved wearing it. This winter (1 year later), she is 2 and wearing 2T clothes and this suit fits her perfectly. This suit was such a good investment for us because we got 2 years out of it. The construction is great, it is super warm for her and so cute! I added a picture from each year wearing the same 18-24 mo Columbia suit. (sitting 1 year old (12-18 mo clothes normally), walking 2 years old (wearing 2T clothes normally).