We washed them before use according to manufacturer's instructions and have washed them several times since. The fabric stays so soft and hasn't shrunk yet. My 9 year old son currently weighs 88 pounds. He is 52" tall with a 28" waist and 32" hips. They fit snug but not tight like short shorts. Some other brands in this size he has are Hanes, a Cat & Jack -Brand from Target, they also fit him well in this size range but they are longer and hit the hips more Hope that helps for comparison.
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