I bought 3T for my son who now wears 2T clothes. It fit him like a small 3T, but the cuffs on the wrists were very tight. Maybe his arms are bigger than average, but I've never had another shirt that was so tight that his arms would go through the buttoned cuffs. I recommend only taking one size for this.
Van Heusen Sleeve Dress Poplin
42 Review
The Good Day Lab Clean Shield: Ultimate Comfort and Breathability in Tagless 4-Way Stretch Polo
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Boys' Long-Sleeve Disney Star Wars Marvel T-Shirts by Spotted Zebra
46 Review
👕 Hanes Boys' Short Sleeve T-shirt Value Pack (3-pack) - Essential Wardrobe Basics
44 Review
👕 Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
Waterproof Cozy-Dry Rain/Snow Pants for 💧 Kids by JAN & JUL, with Fleece Lining
64 Review
👖 Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
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Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review