My wife carries a Shield 9 most of the time, IWB. She has recently wanted to start OWB. As most of her belts were crappy, first thing we did was get her a good gun belt. So, she goes OWB. Says she can't even tell she's carrying the Shield, I said that's the point. All's is well....
We go to the LGS. We buy a IWI Masada (which is now sporting a Holosun 507c, and will be in my duty rig), a Colt Competition and a Sig TacOPS. The Colt for her. Now she wants to carry a full size 1911. Who am I to argue? She tries it, and with her new belt, loves it.
The day she sports the 1911, we go to another LGS. There we spy a Steyr M9 A1, something that's been on the short list for a minute. It's quickly bought. Currently awaiting the AlienGear OWB holster for it. Then that's going into her carry rotation.
So, there you have it, my wife carries a Shield 9, a full size .45 1911 and soon a full size Steyr. My advice, regardless of pistol, make sure they get a good belt and holster.