6 sizes Your dogs size can be determined by measuring the chest and the back from the back of the head to the base of its tail. If you follow the measurement instructions, the coat will fit the neck and chest perfectly, just like a glove. SIZE: 12: Bust: 42cm; Back length: 32cm; Neck circumference:32cm 16: Bust: 53cm; Back length: 40cm; Neck circumference:38cm 20: Bust: 63cm; Back length: 56cm; Neck circumference:44cm 24: Bust: 76cm; Back length: 63cm; Neck circumference:52cm 28: Bust: 88cm; Back length: 73cm; Neck circumference:63cm 30: Bust: 103cm; Back length: 78cm; Neck circumference:70cm With Velcro fastener With a Velcro fastener on both sides of the chest, the coat is incredibly easy to put on and take off. There is also a Velcro fastener at the front for adjusting the neck width. Thanks to the Velcro fasteners, it can be adjusted a little in size. Leash hole Our reflective vest comes with a leash hole at the back of the neck, so that you can easily attach the lead to the collar without pulling the coat towards the back of the dog. Offers protection: The chest protector provides your dog with greater protection from the elements as well as reducing the amount of cleaning one has to do after a long muddy walk. Tips: Hand-washing and air-drying are recommended.