It's a simple concept. You take a simple (slim) leather belt, and then cut it down to acceptable bracelet size. Mine wraps around my wrist twice, just because that's how I like my bracelets.
You then punch holes with a leather punch, and then it's wearable.
The cost is minimal, I got my belt for 99 cents at Goodwill, or you can use an old belt you have. It looks cool if the belt is fairly worn, and I speculate the shape and size of the buckle affects the spiffness of the whole project. If you have an allergic reaction to metals, the buckle will touch your skin a lot, so take that into account when making this (Clear Nail polish solves this)
Thanks, and while we're on the subject of belts, check out my Ible