Dog Wheelchair for Extra Small Dog (Size 2) By Huggiecart. Approximate Weight 9 to 18 Lbs Huggiecart Dog Wheelchair for extra small dog (size 2) weight 9-18 lbs. (Belly to ground measurement between 5" to 10.5") Adjustable in length, width, and height. We have more sizes available to fit your dog at Huggiecart Neoprene Chest Harness, Rear legs stirrups included, further adjust the dog wheelchair in length, width, and height for best fit. Light Weight Aluminum Frame, Premium flat proof wheel with bearings for smooth roll For dachshund-ish body type, size 2 extra small dog wheelchair is the best fit up to 25 lbs.