The best IMO would be to go to the Milt Sparks site and figure out what size belt you need to order. Probably one of the best gun belts available and it comes pre-curved (a shape it'll take on over time anyway). While you're there, get a VM2 holster for whatever pistol you carry and a mag holster. They're great, I have 3, all I use. Lots of people copy it but this is the original. Has a metal band in the mouth, different size loops or can tuck a shirt with clips, positive retention but very easy to reholster, conceals very well, my 15yo holster still works like new. This stuff will last forever, is VERY well made by hand and also maintains decent prices.
I think you need to get your order in ASAP though because I think they only accept order the first of the month due to backlogs. They have a long wait time and it used to be worse so they started accepting orders once a month only. Worth the wait though, well worth the wait.
If you have a 1911, even better because they offer a lot of holsters for 1911 that don't fit other models. They kinda cater to 1911's. But the VM2 is made for about every modern pistol and is the one you want regardless of what you carry. Everyone should have one, it's that good.
I have a double leather belt for carry, it doesn't fold or anything, but the guy that made 'em is dead now. A good belt is paramount for carry, that and the holster are more important than the choice of firearm really. I wish I had a Milt Sparks belt and someday I may get one, but the one I have is also good leather and still holding up. It secures the VM2 holsters and mag carriers.