My daughter was thrilled when I showed her the pink cat thermal underwear (that's what she says lol). They fit like you would expect from 3T tops. My daughter is 3 years old but all my kids are small so they probably fit up to 5 years old lol. They're nice and thick, but breathable. The prints on it are well done so you don't have to worry about the washing machine removing them over time.
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