Premium Quality Jute Automotive Carpet Padding. 20 oz. weights 20 oz. per square yard , and is 1/4" ( 0.25") thick. 20 oz. is used, where people want a thin 1/4" carpet padding. 27 oz. weights 27 oz. per square yard , and is 3/8" ( 0.38") thick. 27 oz. is the most popular weight. 40 oz. weights 40 oz. per square yard , and is 1/2" ( 0.50") thick. 40 oz. is the best for reducing road noise. Width: 36" Minimize Vibration/Vehicle Noise Easy to Use Durable, and Cost Effective Cut With Scissors or a Knife Can Be Handled Without Gloves Contains No Irritants