1cm=0.394inch,1inch=2.54cm 1 lb=0.4536kg; 1kg=2.205lb (lb-pound; kg-kilogram) Learn dimension as under, then selectrightdimension (1-3CM error) Measurement(CM) Chest Shoulder Size Peak Weight S 96 40 64 165cm 50-60kg M 100 41 66 170cm 60-67kg L 104 42 68 175cm 70-75kg XL 108 43 70 180cm 80-85kg 2XL 112 44 71 185cm 90-95kg 3XL 116 45 72 190cm 95-105kg expensivebuddy, if you can't know which dimensionyou'll be able toput on, please contact us. thanks for you