6" x 9" - 1000PC White Poly Mailers Envelopes Bags with Adhesive Self Sealing Strip, Mailing Shipping Packaging Supply by Metrogalaxy EASY USE! Pressure sensitive, Self-Sealing, Peel and Stick Adhesive SAVE Money! Light weight poly material, big save on postage NO SEEN! Black inner surface to keep contents secure and private NO EASY TEAR! High strength seam and material gives maximum protection FAST SHIPPING! USPS Priority 1-3 Days!