Size Chart for Medium Breeds

Measure the Rear Leg Height, from the top of the leg where it attaches to the abdomen down to the toe pad, while your pet is lying down, as shown in the photo. Do not pull the leg tight; leave some natural bend.

Rear leg measurement diagram
Rear Leg Height Wheel & Strut
10-12" 6" struts and 8" wheels
13-14" 9" struts and 8" wheels
15-18" 12" struts and 8" wheels