The Affenpinscher is a small dog with a harsh, shaggy coat, and longer hair all over the face. This dog is square-bodied, with a deep chest and round head with a well-defined stop. The lower jaw is generally slightly undershot, protruding below the dog's short nose. The dog's teeth and tongue should not show when his mouth is closed. The black eyes are prominent and rounded, but should not bulge or protrude. The rims of the eyes are black. The hairy ears are pointed and erect when cropped, but may be left natural, in which case, they might be erect, semi-erect, or dropped. The tail may be natural or docked to 1 or 2 in.; it is carried erect. The coat is usually black or dark gray, but tan and red (with or without a black mask) are also acceptable. A small white patch on the chest is acceptable. The preferred height is 9-1/2 to 11-1/2 in. The Affenpinscher is described as having a "neat but shaggy" appearance, with a monkey-like face.
Named "monkey dog" because of his monkey-like facial structure and expression, this feisty toy terrier originated in Germany. The name Affenpinscher actually means “monkey-like terrier.” At first a farm dog and ratter, probably larger in size, the Affenpinscher was miniaturized and became a house pet during the eighteenth and nineteenth centuries. Today the Affenpinscher is primarily a companion dog.