see also: Circle Beard, Facial Styles The Door Knocker is a small chin beard, connected to a moustache in a round or oval shape around the mouth. Obviously inspired by its shape, a Door Knocker beard is a slang term for a Circle Beard. Like the Circle Beard, some people might mistakenly call it a Goatee. Whatever you call it, the most important thing is that you like the look and it fits your face and personality. To achieve the Circle Beard, it's best to first grow out a full beard. Then, shave down the cheek area and trim the outer edges for smooth, symmetrical lines trying to align with your smile lines.