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Boys' suit size calculator

Measure once, order the right size: match his height (or age) and chest to each brand's published chart.

Find his size

Enter his height (or just his age), plus chest if you know it. We match the measurements to each brand's published chart and show the size to order.

Standing height, no shoes.

Around the fullest part, under the arms.

Used only if height is empty.

Charts checked 10 Nov 2026.

    Sized against each brand's published chart. Prices and buying links live on each brand's page.

    Size charts differ between brands and change without notice. We match your measurements to each brand's published chart, checked on the dates shown. Always measure before ordering and confirm the current chart at the retailer.

    Prefer paper? Print the full size chart: every brand on one page.

    Browse every brand chart

    Each chart is dated and sourced. Useful if you'd rather check the numbers yourself.