I have a yall skinny nephew so buying clothes for him is horrible. Hes about a 3 to 4 in the waist with a 3 fitting just right. Because he grows so fast I always order the next size up. Great thing about this brand is even when Inorder a 4 they fit him. They don't sag or fall off. And hes very tall for his age and they still come right below the knee which Inlike for him. And I love the color options this brand has. Prices are always reasonable