Tragic mismatch of size with reality. We got the 9-12 months size, which usually fits a bit big on our baby who is currently 6 and a half months old (the 6-9 months size is just borderline)... and it doesn't fit him! This is the first time this has happened to us, there is no way this garment that arrived in our hands is intended for babies aged 9-12 months!!! It's borderline for 6-7 months depending on the child's height. Such a shame...