Denim is a material most often associated with blue jeans. Denim is priced as a weight, When you say 12 Oz Denim weight means weight of 1sq yaard denim is 12 ounce denim yard weighs five ounces. Denim varies between 5 and 32 ounces. The lower the count, the softer and more Thinner the material, and the heavier and stiffer Fabric contains the higher weight ount.