XS， 20cm long back， chest 30cm， 1-1.5kg for the following
S， 25cm long back， chest 35cm， 1.5-2.5kg for the following
M， 30cm long back， chest 40cm， 3-4kg for the following
L， 35cm long back， chest 45cm， 4-5kg for the following
XL， 40cm long back， chest 50cm， 5-6.5kg for the following