Please note this is in Asian sizing, Asian size is smaller than western size e.g. UK, US, AU, please check the measurements carefully before making a purchase. Please allow 2-4cm error due to the manual measurement and different measurement methods. If you are not sure which size to buy, please provide height and weight, we will recommend a suitable size. M: length 100cm (39.3 inches), chest 96cm (37.7 inches), strap 45cm (17.7 inches), fit weight 49-54kg; L: length 102cm (40.1 inches), chest 100cm (39.3 inches), strap 46cm (18.1 inches), fit weight 54-59kg; XL: length 104cm (40.9 inches), chest 104cm (40.9 inches), strap 47cm (18.5 inches), fit weight 59-64kg; 2XL: length 106cm (41.7 inches), chest 108cm (42.4 inches), strap 48cm (18.9 inches), fit weight 64-69kg; Please allow slight colo