Walkin’ Hock Hugger Size:Medium and XLarge sizes are compatible

and XLarge sizes are compatible with the Medium

Dimensions Height 15 3⁄4“ Width 1 3⁄4“ Weight 1lb 9oz Axel 1⁄2“ Bearing Yes Width at Bearing 2 1⁄8“

please verify the size compatibility: The XSmall and Small sizes are compatible with the Small wheelchair

Rear Leg Height Wheel & Strut 14-16" 9" struts and 12" wheels 17-19" 12" struts and 12" wheels 20-22" 12" struts and 16" wheels 23-25" 15" struts and 16" wheels

Measure the girth of your dog’s chest right behind the front legs all the way around the body (the widest part of the rib cage)

Walkin’ Hock Hugger Size:Medium and XLarge sizes are compatibleSize Measurement A Weight Height of Hugger XSmall 2 3 10 15 lbs 5 Small 2. 5 3. 25 15 25 lbs 6 Medium 2. 75 3. 5 25 60 lbs 7 Large 3. 25 4 60 100 lbs 8. 5