The Uncle Mike Size 0 Holster is a popular holster model that is designed to fit compact and subcompact handguns. It is a versatile option that can fit a variety of firearms, including several Glock models. For Glock models like the Glock 19, Glock 23, Glock 26 and Glock 27, the Uncle Mike Size 0 Holster is a good fit for the Glock 26 (subcompact) and the Glock 27 (subcompact) more specifically. Constructed from durable, flexible nylon that offers comfort and ease of wear while still providing durability and discreteness.