Rooster Farms Little Dog Wheelchair XS Harness - Adjustable Back Leg AidSizing Note: This wheelchair is specifically designed for small dog breeds up to 10kg. The wheelchair frame remains the same size across all options what changes is the harness size, which must match your dogs body measurements. To ensure the best fit, carefully check the chest girth and distance between front and rear legs using the size chart provided in the images. The Rooster Farms Dog Wheelchair is designed to enhance your dog's quality of life,