I bought size 3T for my son who just turned 2. He weighs 25 pounds. My son is a skinny type but I still recommend taking him a full size, maybe even 2 sizes up if your little one is a bit chunkier.
Star Wars, Marvel, and Disney Short-Sleeve T-Shirts for Boys from Amazon Essentials
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π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
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