The Packaging Wholesalers 8-1/ 2 x 12 Inches 2 Bubble Lined Self-Seal Poly Mailer, 100 per Case (ENVB833) 8.5"x12" Mailing Envelope 3/16 Inch bubble lining cushions products during shipment. Mailers feature a convenient peel and seal closure. Smooth exterior makes labeling easy Moisture, Tear and Tamper resistant