The Henry Schein Buster Classic Elizabethan Collar (E-Collar) for Dogs. An Elizabethan collar, also called an E-collar or "cone of shame", is a cone made of plastic that is placed around a dog's head to prevent them from licking or chewing at a wound, dressing, or surgery site. A protective collar can be used to stop a dog from licking themselves after surgery or if they have a sore spot. Size 25- Adjustable to use on small to large dogs. I got this to use on my 15 lb. Cavalier King Charles Spaniel, but went with a different style instead so this never got to be used.