The pug is a breed of dog with physically distinctive features of a wrinkly, short-muzzled face, and curled tail. The breed has a fine, glossy coat that comes in a variety of colors, most often light brown (fawn) or black, and a compact, square body with well-developed muscles.
While the pugs that are depicted in eighteenth-century prints tend to be long and lean, modern breed preferences are for a square cobby body, a compact form, a deep chest, and well-developed muscle. Their smooth and glossy coats can be fawn, apricot fawn, silver fawn, or black. The markings are clearly defined and there is a trace of a black line extending from the occiput to the tail. The tail normally curls tightly over the hip.