Most kilt belts/buckles are a hook in loop type fastener. Most other belts are secured through holes in the belt.

I find most of the more affordable kilt belts and buckles to be of mediocre quality and appearance. I went to a western store and bought the widest belt they sell with only one row of holes, I think it's either 1 3/4 or 2 inches. There is a huge selection of buckles available for these belts and I find they look great with a kilt. Plus you get a better quality belt for the money