You Are Buying 50 Each 9″x12″ Grey Self Seal Poly Mailers Just Peel and Seal Product Features:Usable Space: 9? x 12??Width X LengthThickness: 2.0 MillimeterColor: White?conceals packages from visibilityMade from premium polyethylene?which enables easy label, stamp and ink applicationPlain exterior?ideal for logo/brand printing and marketingHigh adhesive seal strip?packages are tightly securedProvides excellent protection during shipmentsPuncture resistant and tamper/water proofApproved by UPS, FedEx, and USPSIdeal for non-fragile medium size shipmentsEconomical shipping method?substantially less expensive than using corrugated boxes and mailing tubesInterior color of mailer is subject to change