0   9 x 12Poly Mailers Polyethylene exterior providing superior tear and puncture resistance!White outer coating with silver inner lining which makes it opaque for privacy of the content!Self-sealing adhesive with easy peel off and secure when closed!Light Weight though durable - Save on shipping costs when mailing items due to light weight!Water resistant!The seams are extra strong and allows for overstuffing!Fluid surface for easy sticking of self-adhesive labels!Fast shipping with tracking!