There are several questions that you should seek answers to before you purchase your holster. Do you plan on the holster being Inside the Waist Band (IWB) or Outside the Waist Band (OWB)? What position is comfortable for you to wear the holster, on the hip at 3 o'clock, behind the hip at 4 o'clock or even appendix carry? What belt will you wear with the holster which will impact the belt loop size on the holster. The cant of the firearm in the holster should be determined by your ability to comfortably achieve a firing grip on the weapon before your draw stroke so that when your firearm must be drawn from the holster nothing should need to be done other than align your sights and move your trigger finger from the frame to the trigger when your sights are on target. How much retention will you need to keep your firearm in the holster? There are different levels of retention in some holsters and molded in retention in others. Height of the sweat guard or rear holster panel should be considered depending on how much of rear end of the slide you are comfortable with against your body. Due to the infinite number of body sizes, shapes, arm lengths and hand sizes that I would suggest that you try on as many holsters as you can get your hands on, even if they are not the make and model of your firearm. My priority for a holster is that it fits comfortably and provides an immediate firing grip on the draw stroke. Ultimately you will most likely decide that you will need to purchase more than one holster to meet your concealed carry needs due to seasonal clothing changes and other variables.