Thick, puncture resistant bags are ideal for heavy products or parts with sharp edges Super heavyweight bags feature a track zipper extending the entire width of the bag. Meet FDA & USDA requirements for food applications. Sizes listed are the inside dimensions of the bag. Office Depot Brand 8 Mil Reclosable Poly Bags 9in. x 12in., Box of 500 is one of many Reclosable Poly Bags available through Office Depot. Made by Office Depot.