I bought these for my son who wears oversized boxer shorts. It's not really big, more like medium sized. Luckily they fit my youngest son so he can wear them. They are soft and comfortable, my youngest son says. Feel free to increase the size! Also, they don't have a flap in the front, so your boys have to get their underwear out of the trash when they go to the bathroom.
Comfortable & Practical City Threads Underwear: Sensitive-Friendly Boys' Clothing
47 Review
π¦ ViCherub Boys' Black Large Underwear - Pack of 3 | Boys' Clothing Collection
42 Review
π Brix Boys Long Sleeve Tees - Optimized Clothing for Boys
42 Review
Pack of 6 Baby Soft Cotton Underwear for Little Boys - Dinosaur Briefs, Toddler Shark Undies, Children Truck Panties
41 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review