We bought size 7 for a skinny 7 year old girl and there is nothing special to grow. So I disagree with some reviewers who say it's big. Unfortunately the following two sizes are not available at Revain so don't worry about returns.
π Kanu Surf X Large Boys' Swim Rashguard Sleeve - Premium Protective Clothing for Swimming
43 Review
π©² Boys' Protective Swimming Bottoms by City Threads - Swimwear for Enhanced Safety
56 Review
Pineapple Print Medium Boys' Spotted π Zebra Shorts - Trendy Clothing for Kids
52 Review
Platinum Rashguard for Boys by Kanu Surf
54 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review