Abstract: An adjustable animal collar provides a strap with a housing at one end and a second end connected to an engagement area. The engagement area is formed with a plurality of teeth received into the housing, where a rotating pawl engages the teeth. The pawl, pivotably rotating within the housing and partly covered in one embodiment with a cover plate, has a biasing means, which in one embodiment is a torsion spring, to bias the pawl in favor of engagement with at least one of the teeth. The biasing means can be overcome by manual pressure on a portion of the pawl, causing release of the collar. The collar may have at least one safety device preventing the pawl from being inadvertently disengaged, and a safety indicia area to visually indicate the locked or unlocked status of the collar. The collar is capable of attachment to a variety of accessories.