Elastic, self-adjusting belt. The secure and comfortable way to hold up your pants without the buckle bulge - even works with yoga pants or sweats. xxs - youth, adult 0-2 (23 inches) xsmall - adult 2-4 (25 inches) small - adult 6-10 (28 inches) medium - adult 10-14 (30 inches) large - adult 14-18 (32 inches ) x-large - adult 18-22 (36 inches) xx-large - adult 22-26 (39 inches) xxx-large - adult 26-30 ( 42 inches)