Dog wheelchair, adjustable length and wheel diameter 20cm, supports pet mobility. - Type: Dog wheelchair - Wheel diameter: Approximately 16cm For small dogs, Dachshunds, Corgis, etc. Adjustable with belts, etc. My dog, an 8kg miniature dachshund, used it. For your reference. Thank you for viewing. Please see the photos for the size. I had it custom-made for my previous dog, and we adjusted it with Velcro, etc. I'd like to pass it on to someone who really needs it, even if they only use the parts. I will clean it as much as possible, but please understand that it is a used item before purchasing.