My daughter is 46 pounds and 43 inches tall and we ordered a size 128/134 (I think it was a US size 7/8). It fits her well, except for the arms they are oversized and sagging although the length is good. I love that the zipper is in the front so she can put it on herself. The material feels good and I love that the crotch area is crinkled so it doesn't have seams that feel uncomfortable. She's only used it once but so far we love it.
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