Have carried a 1911 Commander, Browning Hi-Power, both are "duty-sized" automatics.
I carry mine in outside the waistband holsters, with a sturdy belt. I use an old, now discontinued Milt Sparks Roadrunner for the 1911. The Hi-power holster I had a local holster-maker produce for me.
With my wardrobe no one notices. No one notices anyway, people generally walk around oblivious.