I have one of these pants for my son that has been passed on and they fit perfectly. The new ones I bought are bigger in the hips and waist but still a better option for durability and fit than any other pants I've tried. They hold up well and don't wrinkle. It's narrow at the waist and also so high that it seems impossible to find pants that don't require a belt (which is a big problem for my 12 year old). I would recommend buying these based on their price and performance.
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