The size for your reference,it's about 1-3cm deviation,1inch=2.54cm,1cm=0.39inch
XS fit dog back length is 16cm, chest is 27cm, neck is 20cm.
S fit dog back length is 20cm, chest is 32cm, neck is 23cm.
M fit dog back length is 25cm, chest is 37cm, neck is 26cm.
L fit dog back length is 30cm, chest is 42cm, neck is 29cm.
XL fit dog back length is 35cm,chest is 47cm,neck is 32cm.
