Gray seems to fit but is snug. The black and white is too tight for my 41 lb boy who fits at the waist with 5t old navy blue sweatpants or XS Nike sweatpants, tea collection size 5 and gap size 5t. I would go up a size, I have 10 pairs of underwear now that he doesn't wear in a size 5-6.
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Pack of 6 Baby Soft Cotton Underwear for Little Boys - Dinosaur Briefs, Toddler Shark Undies, Children Truck Panties
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π Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
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