I ordered a size 7 for my 7 year old and it looked more like a 5T.
We live in a colder state and the skirted leggings were a lot thicker than regular leggings which was really nice, but they were short on the legs so I would suggest ordering a size or two up. No issues with material or quality, this is typical of things a baby wears for around six months because they grow so fast.
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