MEN SIZE CHART:order a size up would be recommend S: bust 86-92cm, waist 80-86cm, hips 92-98cm, sleeve 68cm, suitable for height 164-168cm, suitable for weight 45-55cm M: bust 90-96cm, waist 84-90cm, hips 96-102cm, sleeve 70cm, suitable for height 168-172cm, suitable for weight 55-65cm L:bust 94-100cm, waist 88-94cm, hips 100-106cm, sleeve 72cm, suitable for height 172-176cm, suitable for weight 65-75cm XL:bust 98-104cm, waist 92-98cm, hips 104-110cm, sleeve 74cm, suitable for height 176-180cm, suitable for weight 75-85cm 2XL:bust 102-108cm, waist 96-102cm, hips 108-114cm, sleeve 76cm, suitable for height 180-184cm, suitable for weight 85-95cm 3XL:bust 108-114cm, waist 102-108cm, hips 114-120cm, sleeve 78cm, suitable for height 184-188cm, suitable for weight 95-105cm Ergonomic Design 3mm Diving Suit - The 3mm wetsuits are worn suitable for 55- 64 water temperature, it keeps you warm in cold water. The full wetsuit designed with Back zipper, extra long leash, easy to reach. Imitation Shark Skin Material - Chest area is made to imitate this shark skin wetsuit, feels like a second skin! Other portions of high elastic neoprene, nylon fabric lined with a super-elastic, can achieve full motion. Superior and Durable Knee-pads- The knee pads are printed with special glue ink, which is firm and durable. Conducive to protecting the knee material and skin. Adjustable Velcro neckline - The wetsuit has a velcro collar, you can adjust the collar to the size that you feel most comfortable, adjustable velcro collar helps assure a perfect fit. Perfect for Various Water Sports - UPF 50+, protect you from the sun and keep away from jellyfish bite risk. Full suits are great for diving,snorkeling,paddleboarding, kiteboarding, kayaking, canoeing.