I got the 9C, and while I don't have a Shield, I have compared them in size. For me, the 9C is a bit too large for concealed carry, except under jackets (obviously, it's just me, as the above post indicates they're comfortable with it). I didn't see enough difference in the Shield, for concealment, so I went to a Kahr PM9 for my concealed carry gun, which works under tee-shirts or anything.