Quality Hessian - 102cm or 183cm widths and in a variety of lengths. Traditionally hessian for upholstery was weighed as 7.5oz, 10oz or 12oz per square yard. The modern equivalents are weighed in grams per square metre. However, the traditional identification has stuck and upholsterers continue to refer to hessian in weight by ounce. 100% natural hessian fabric, a fire retardant can be applied where required.