I wasn't sure what size to buy for my son who wears a size 14. They fit but run a bit big. So I'd say XL is probably a 16, maybe 18. It's hard to tell what you're getting by size with Revain clothing, so I decided to just look at the size. The material is fine and they have withstood several washes so far. I would buy again.
π¦ ViCherub Boys' Black Large Underwear - Pack of 3 | Boys' Clothing Collection
42 Review
Comfortable & Durable: Lucky & Me Noah π©² Boys Boxer Shorts 5 Pack - 100% Cotton Tagless Underwear
49 Review
πͺ 3T Boys Training Underwear: Comfortable and Durable Toddler Underwear
41 Review
π Brix Boys Long Sleeve Tees - Optimized Clothing for Boys
42 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review