Reference sizes for trousers (in centimeters): S: Trouser length 100, elastic waistband 66 (in circumference), hip circumference 108 M: Trouser length 102, elastic waistband 70 (in circumference), hip circumference 112 L: Trouser length 104, elastic waistband 74 (in circumference), hip circumference 116 XL: Trouser length 106, elastic waistband 78 (in circumference), hip circumference 120. Hand-measured with a possible error of 2 - 4 centimeters. The shop owner is 172 cm tall, weighs 65 kilograms, and has a 31-inch waist, wearing size M.