Learn about Designer Dog Harnesses All styles will be coming soon! If you don’t see the style you want, order any harness and let us know in the notes section (at checkout) which style you need. Our Harnesses are great for both small and large dogs. We make harnesses tiny enough to accommodate dogs as small as puppies, and ones large enough for the lovable giants. Mimi Green Harnesses are all custom made, just for your dog and we think all of them are super cool too.