I know that all the tent vendors at Highland Games and Ren Faires sell matching belt + waistplate combos (in 2", 2.25", and 2.5" sizes) but I've also seen folks wearing plain leather belts with round or D-ring buckles. Those tend to be a bit on the wider side as well. Is there a standard size for a belt that's worn on a kilt simply as a visual accessory?

I ask because I notice that my body shape looks much nicer with a belt if I'm not wearing a vest, regardless if I'm wearing a kilt or pants. I tend to look rather sausage-like without some sort of visual midpoint delineation.

The belt + waistplate combos tend to be a bit pricey and most of them are overly shiny. I'd ideally be looking for a more subdued option for the waistplate since it would generally be worn in a less-formal setting. It would be very nice if I could get just a plain brown or black leather belt and either add my own closure or get one with a dull metal D-ring or round buckle.