I ordered them a size 7/8 for my kid, they were too big so I ordered one size smaller and I like them, I will leave the larger size anyway, so that she will have a pair when she grows up in them because i love that they have elastic at the waist, i don't have to worry about my child having trouble unbuttoning his pants. I would say the thickness is just right, not too thick then my kid won't sweat too much or anything.
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