My son is 9 years old on average. The middle one fit him well, he just outgrew the size of the small one. I wish they made more cotton/spandex underwear, my son prefers this material over polyester/spandex. Most of the time he just sleeps in it.
Pack of 6 Baby Soft Cotton Underwear for Little Boys - Dinosaur Briefs, Toddler Shark Undies, Children Truck Panties
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π¦ HLMBB Dinosaur Toddler Underwear Training | Boys' Clothing for Easy Potty Training
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