The lower jaw is well developed, wide and deep. Lips are clean and tight. The American Pit Bull Terrier has a complete set of evenly spaced, white teeth meeting in a scissors bite. The nose is large with wide, open nostrils. The nose may be any color.
All colors are equally acceptable except blue, which is a serious fault.
Haw should not be visible. EARS - Ears are high set and may be natural or cropped without preference. If natural, semi-prick or rose are preferred. Prick or flat, wide ears are not desired. The neck is of moderate length and muscular.