Damn, another stereotype slain. I thought everybody in Louisiana kept their pants up with a piece of rope.
I know a guy who used to keep them up with an extension cord.
I'll agree with 1.5". I've got one from 5.11 that works great, feels great, holds everything up and fits all the pants I own. I read the Wilderness Instructor is a good 1.5" too. Those are if you're ok with Nylon.
Damn, another stereotype slain. I thought everybody in Louisiana kept their pants up with a piece of rope.
As stated above, 1.5" is the ideal general-use width. Most holsters are made for it, and it works equally well with jeans and most suit pants. 1.25" can work, but not as well. If you need something a little more dressy with a suit, you can get a 1.5" belt that tapers down to 1.25" or 1" near the buckle.
Doublethickness is good on a leather belt, but also look at how it's constructed. Quality makers like Sparks tend to skive down the edges on the outside piece. This makes it a lot harder for the belt to roll over from the weight of the holster and accessories. That'll give a much more stable platform, and be more comfortable to boot.