My boys always wear the trousers in sizes 6/7 and 8/9. I ordered their standard size small and medium which they always wear and figured the extra length wouldn't be a problem as my boys are leggy. Spring. people don't lie. They are LONG. So my child in size 8 Small fits perfectly and my child in size 6/7 XS fits well. They're still a long way off, but that's good for us. If your child has short legs I might skip them altogether, but otherwise just scale them down.
HILEELANG Boy Girl Polar Fleece Jacket: Warm Hoodie Sweatshirt for Little Kids & Toddlers - Full-Zip Outerwear Coat
45 Review
Catalonia Boys' Oversized Sweatshirt: The Ultimate Comfortable Pullover
44 Review
Boys' Fleece Crew-Neck Sweatshirts by Amazon Essentials
41 Review
Parent's Pick: HZXVic Dinosaur Sweatshirt Pullover π¦ Black 6T - Trendy Boys' Fashion Hoodie & Sweatshirt
37 Review
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review