All of our belts are made from 9-10 ounce famous Herrmann Oak Leather except some of the bridle leather belts are made from 8-9 ounce, and most of our leather belts are available in thicker 11-12 ounce leather. If you want a belt heavier than that we usually keep a few hides in 13 or maybe 15 ounce saddle shirting leather . If you want a belt made from leather heavier than 11 ounce just e mail us or call to talk about it.