Dog Wheelchair for Medium Dog (Size 4 R) By Huggiecart. Approximate Weight 40-60 Lbs Huggiecart Dog Wheelchair for medium dog (size 4 R) weight 40-60 lbs. (Belly to ground measurement between 8" to 16") Adjustable in length, width, and height. We have more sizes available to fit your dog at Huggiecart Neoprene Chest Harness, Adjustable to fit. Rear legs stirrups included Light Weight Aluminum Frame, Premium flat proof wheel with bearings for smooth roll Find the right size for your dog then further adjust the dog wheelchair in length, width, and height for best fit.