Below are the measurements. Please check before ordering, and allow 1-3 cm difference in measurements. These are suitable for small breeds.
XS: back length: 20cm(7.8"), chest: 30cm(11.8")
S: back length: 25cm(9.8"), chest: 35cm(13.8")
M: back length: 30cm(11.8"), chest: 40cm(15.8")
L: back length: 35cm(13.8"), chest: 45cm(17.8")
XL: back length: 40cm(15.8"), chest: 50cm(19.8")

