Bought these for my son. He loves them. Won’t wear anything else. Fit about as expected to. They’ve held up well and he’s been wearing this brand for years.

The mediums fit my tall, skinny 10 year old very well. He just declared them the most comfortable underwear ever.

Awesome Fit, as expected, my 9 year old is 52″ and 80+ lbs, He loves his Calvin Klein

My son loved em..
Calvin Klein Boys’ Assorted Briefs (Pack of 3)