Our All-Weather Resin Filled Bags measure 6" x 6" and are Filled with 15-16 ounces of Plastic Resin as Prescribed by ACA Regulations. Each bag is digitally weighed for accuracy. When a cornhole bag is "resin-filled," it means that the bag is filled with small plastic resin pellets. The beads do not break down over time like corn-filled bags, which means they'll last longer. Resin bags are also guaranteed to never mold or attract rodents, and they can easily be cleaned with soap and water.