This set has a very odd fit. I'm about 4ft 11in / 100lbs / size xs / 0 so I bought a 7/8. The pants are quite big, I would say it's like 10/12, but the shirt is definitely like 5/6. he is so tiny. Unfortunately they are not heat resistant as you can hold them and see through them, a tank top is a must. You are not warm. I hope my review helps someone find the right size because they really are so cute!
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