I ordered these a size 7/8 for my kid, they were too big so I ordered a size down and I like them, I still leave the larger size so she will have a pair when she grows up and wears 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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