ShuoHu Pet Dog Plaid Shirt Coat Clothes Top Apparel [Our Size XS] Back Length: 25cm9.84, Collar: 24cm9.45, Chest: 38cm14.96 [Our Size S] Back Length: 30cm11.81, Collar: 27cm10.63, Chest: 42cm16.54 [Our Size M] Back Length: 35cm13.78, Collar: 30cm11.81, Chest: 46cm18.11 [Our Size L] Back Length: 40cm15.74, Collar: 33cm12.99, Chest: 54cm21.26 The dogs size should be 2-3cm less than the size of the coat above!