I'm a bit of a chunky guy and I have a DeSantis Pro Stealth for mine. I'm looking to get one for my P226 Sig also. here is the description for the Sig.Nice feature is that one sits both right and left handed people and it is quite comfortable and fits snugly IWB.
Pro Stealth™
The N87 is made of premium padded ballistic nylon. The 1 3/4" sturdy, powder coated black spring clip keeps this beauty securely anchored to your belt. A spare magazine pouch is standard for the auto loader models, and they are ambidextrous. The clip may be removed and inserted on opposite side for left hand carry. Available in black.