Leather is usually measured in terms of ounces. One ounce equals 0.4 millimeters, thus a weight of 3 to 4 oz. means the leather is 1.2mm to 1.6mm thick. In an effort to make leather a uniform thickness, hides are run through a splitting machine. However, each animal is different and there is always a slight thickness variation throughout the hide. This is why leathers are usually shown with a range of thickness, such as, 2 to 3 oz., 1.4 to 1.6mm., etc. If a single measurement is given, such as 3oz, it is assumed to be the average thickness of the hide.
At Heritage Moto we recommend top-grain leather with a thickness between 1.0mm to 1.6mm for both durability and safety. If you are buying a build-to-order jacket and want a lighter or heavier leather please let us know. We will check availability of hides and find the best match to your request.
If you have any questions shoot us an email at Info@Heritage-Moto.com. We pride ourselves on customer service and satisfaction!