Boys Size 20 Waist. For pants, waist, hips, and inseam are the most commonly used measurements needed. However, the best way to find the perfect fit for your son is to get accurate measurements of several key areas of his body such as the chest, waist, hip, inseam, and height.
Measure around the child's waist, slightly below the natural waist, where he normally wears his pants. Place the tape measure on the widest part of your chest and measure around your chest. Insert your forefinger between the tape and his body to allow ease in fit.
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Now 20, almost 21, and a 35 inch waist. Children's size chart has boys, girls and baby measurements for standard sizes for clothes and apparel. Customers are welcomed to use our suit size estimator online. Boys' and girls' sizing information.