Bought a size 6 for my 5 year old (43 inches, 48 pounds) and they were HUGE. I could almost fit in myself. I can't comment on the quality as they didn't fit.
π₯ Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
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5 Pack: Youth Dry-Fit Moisture Wicking Active Performance Short-Sleeve T-Shirt for Boys & Girls
42 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
Boys' Dress Pants and Shirt by Spring Notion
42 Review
π¦ Kids Tales Little Underwear: Boys' Clothing for 3M-8 Years
32 Review
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35 Review
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46 Review