The Belly Band is the most versatile and most comfortable method of concealment available. You can wear it in almost every situation! Whether you dress up for the office or go to the gym, The Belly Band can be there, totally concealed and ready! It's made in the USA of heavy duty elastic with a velcro closure. It has two ambidextrous slots: one for an automatic pistol and one for a revolver. It has a 6-inch pocket which conceals important papers, cash, credit cards, as well as a slot for a spare magazine. It works great with medium and small frame revolvers and semi-automatic pistols. It is pictured with a Glock 19 and will easily accommodate a full sized Glock 17, 22 even the Glock 21 & all the mini Glocks. It will even work with all of the popular self-defense handguns including 1911, SIGs and Beretta. You can discreetly and comfortably conceal your handguns under a variety of shirts and sweaters. This holster is completely demonstrated in the Concealed Carry Videos. Sizes are measured by waist, in inches: XS: 24-27 SM: 28-32 MD: 33-36 LG: 37-40 XL: 41-45 2X: 46-52 3X: 52-60