my son is 2 years old. I got the 4t because I thought the shirts might fit if I went a few sizes up. It turns out they are the same size. Just buy one size up to give your son more clothes. The material feels a bit silky like cotton but is worth the price.
Boys 3D Graphic Hawaiian Aloha Short Sleeve Dress Shirt Tops with Button Down - Sizes 2-8 Years by Uideazone
47 Review
Boys' Long-Sleeve Disney Star Wars Marvel T-Shirts by Spotted Zebra
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Soft Brushed Fleece Crewneck Sweatshirt for π Boys and Girls 4-12 Years - Kid Nation Kids
42 Review
π Hanes Boys' Short Sleeve T-shirt Value Pack (3-pack) - Essential Wardrobe Basics
44 Review
π Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
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π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review