Size 9-months, my big baby butt! There is no way this is meant for 9-month-old babies. Look at it. A perfect fit on me, a 3-month-old baby. I think I’d better have a word with the people in charge of clothes size standards. I would be insulted by the size label if this weren’t such a cute outfit. Teeheehee! Look how cute the little happy monkey is! Also, the design on the shirt.