I don’t know much about this item; since item is sealed I have yet to open to measure sizing, but I believe the 90 refers to centimeters in length.

Introducing the Baby Dior Romper, a rare and sealed item that is a must-have for your little one's wardrobe. This romper is designed with baby blue trim that adds a pop of color to the classic cotton white fabric.

Perfect for any formal occasion, christening, or party, this long sleeve romper is ideal for both baby boys and girls. The size is 1M and it features a unisex design that is suitable for toddlers as well. The material used is high-quality cotton that ensures ultimate comfort for your little one. Handmade with care, this romper is a unique addition to any baby's clothing collection.