Domestic Medium Hair is a coat description rather than a breed. It covers mixed-ancestry cats whose fur falls between short and long, usually with a fuller tail, tufts between the toes and a soft undercoat, but without a heavy ruff. They come in every color and pattern, from tabby and tuxedo to calico and solid black.
Because their ancestry is mixed, size, personality and health vary from cat to cat. Most weigh 6 to 14 pounds, live 12 to 18 years and have the sturdy build of a typical house cat. Expect a bit more brushing than a shorthair needs, especially in spring and fall, and plan to meet the cat before deciding, since temperament tells you more than coat length.