The Brady 112633 12″X 9.5″ Protective Envelopes are rectangular in shape and made of adhesive-backed polyethylene material. These self-seal envelopes come in a pack of 10 and are designed for waterproof protection. With dimensions of 12 x 9.5 x 0.04 inches, they are one size fits all and perfect for packaging and shipping needs. Made by the trusted brand Brady in the United States, these protective envelopes provide reliable and secure transportation of your items.