Selle FIZIK ARIONE R3 OPEN REGULAR Rails Kium Blanc White Edition noel Sizes Chest Measurement Waist Measurement PBS_HUTC026507 Sizes Chest Measurement Waist Measurement XS 81 86cm 68 72cm S 87 90cm 73 78cm M 91 95cm 79 83cm L 96 100cm 84 87cm XL 101 105cm 88 92cm Measure your chest circumference by passing the tape measure under your armpits and across the upper part of your chest they feature a large and wide platform providing excellent pedalling stability Classified in the "Snake" category this saddle features a distinctive design: its nylon and carbon anatomical structure is cut out at the perineum area to eliminate potentially painful pressure points in that zone