You Are Buying 100 Each 6″x9″ Grey Self Seal Poly Mailers Just Peel and Seal Product Features:Usable Space: 6” x 9”—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