My boys are very tall and very slim. I ordered the larger ones based on reviews from others and the top fits them perfectly. I would say the top is a size 10 or 12 for boys. However, the pants were huge! Two or my boys fit in the waist of one of the pants and they were quite long.
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review