XS: Back length :20cm(7.8 inch), Chest: 25cm(9.8 inch) ,Weight: 1kg
S: Back length: 25cm(9.8 inch), Chest: 32cm(12.5 inch),Weight: 1.5~2kg
M: Back length: 30cm(11.8 inch), Chest: 37cm(14.5 inch),Weight: 2.5~3.5kg
L: Back length: 35cm(13.7 inch), Chest: 43cm(16.9 inch),Weight: 4.5~5.5kg