The Hock Wrap is intended for dogs with weak ankles following an operation or due to arthritis or injuries to the ligaments / tendons. The Dog Hock Wrap is stabilising, warming and helps to speed up healing. To determine the correct size, measure the circumference both above and under the hock joint. Height: 22cm Upper edge: 20cm Lower edge: 16cm. https://botcanada.com/ Sizing charts can be found https://botcanada.com/sizing-charts/