YKYWbike one piece tri jersey. Marked medium but fits like a small. BEST FIT FOR SOMEONE 5'8"-5'9", 120-130LBS. New with tags, never worn/ridden, all flat stitching and premium materials, non slip ribbing on arms and legs, breathable material on sides, arms, and shoulders. No returns accepted. Email with all your questions prior to purchase. I am 5'9" with medium build and it was too small.