jeansian Men's Slim Plaid Stitching Long Sleeves Polo T-Shirts Tees D511 100% Cotton USA XS(160-165cm 55kg-60kg) (5'3"--5'5" 121--132lbs) USA S(165-170cm 60kg-65kg) (5'5"--5'7" 133--144lbs) USA M(170-175cm 65kg-70kg) (5'7"-5'9" 144-155lbs) USA L(175-180cm70kg-75kg) (5'9"-5'11"155-166lbs) Size please take "Product Description" below for reference. Please allow 1-2cm difference due to manual measurement.