I think their smallest size for girls is Extra Small
Diamond won't fit into the XS, it just falls off of her
She is about 2 pounds, 10 ounces so I guess she would need an XXS which they don't carry...it's a shame because I absolutely LOVE the pink velour hoodie
It's a good thing I can custom order her clothes online through YT sellers or else I would be going nuts over here!!!!!!