Jazz pants have an elastic waistband for easy changing and comfort. Fabric is a mix of cotton, spandex that result in a quality fabric. Adult Size Small: Waist: 24.02"/61cm; Length: 37.60"/95.5cm Medium: Waist: 26.38"/67cm; Length: 38.39"/97.5cm Large: Waist: 27.95"/71cm; Length: 39.37"/100cm X-Large: Waist: 29.13"/74cm; Length: 40.55"/105cm