Packzon Poly Mailers Envelope Shipping Bags with Self Sealing Flap 100 Each 9" X 12" & 12" X 15.5" Total 200 Pack DIMENSIONS: 9" x 12" & 12" x 15.5" do not include 2" flap. MATERIAL: Three layer co-extruded polyolefin (polyethylene) film. Material is waterproof, seal is not. FEATURES: White outer surface & silver inner layer provides confidentiality. Labels adhere easily, Recyclable 100% SPECIFICATIONS: Acid free