You may notice that on materials, such as Vinyl and Fabric, there is an ounce measurement (oz).
The "ounch" here isn't referring to the weight of the full product you get, but its referring to the weight of the material. That weight is determined by how many ounces a square/yard (3ft x 3ft) of that material weighs.
For instance, the fabric materials I offer are typically 8.8oz or 9oz. Meaning that a 3ft x 3ft banner would be about 9oz in weight. That falls into a "Medium Weight Fabric" category.
LIkewize, the vinyl banners that I offer are 13oz. Meaning that a 3ft x 3ft banner would be 13oz in weight.