This is a well-made drop leg or thigh holster designed to fit a range of semi-auto pistols. Please select the color and model you want based on the barrel length of your weapon. We recommend the 4′ model(Medium) for most compact pistols and the 5′ model (Large) for full size weapons. If your barrel is 4.5 inches, opt for the larger size. Please note that this may be too large for subcompacts and for smaller weapons. This holster is designed to be worn below the belt and includes a fully adjustable thigh strap and a quick-release belt clip. it uses an adjustable thumb break to provide additional retention and keep your weapon from falling out whether you are running, jumping, or in a low crawl. it also includes a single magazine pouch to carry extra ammunition.