The small martingale collar is sized for Italian Greyhounds, Whippet puppies and toy breed dogs. It fits a neck size from 7 to 10 inches. The medium works well for an adult whippet, if you prefer a more narrow collar. Six foot leads are available in two choices: a plain lead with hardware matching the collar for $6, or a trimmed lead for $8, with the trim running the entire length of the lead for a splashy look. Click on an image to enlarge and see size choices.