LEBERNA 100 Yellow Kraft Paper 4 x 8 inch Bubble Mailer Self Sealing Adhensive Shipping Packing Envelopes Leberna Brand Self Adhensive Bubble Mailer is only offered by AGY Trading Company on amazon.com. There is no other authorized seller selling Leberna Brand Bubble Mailer on amazon.com. Keep in mind, the positive product review is for Leberna Brand only, not for the generic brand offered by other sellers. Other sellers are not even selling same size. You will pay extra shipping when you use their bubble mailers. Unlike other brand, our mailer has actual internal size / usable size of 4 x 8 inches. Self-Sealing, Peel and Stick Adhesive. Durable Mailers with Light Weight to Save Postage. 100 4x8 Bubble Mailers per Package. "Leberna" brand name is printed at the back of the envelope. That is how you know whether it is genuine Leberna Brand bubble mailer. The printed logo can be covered by shipping label. 100 pcs per bundle. Sold in Bundle. Order what you need and when you need. Enjoy the amazon Prime member fast and free shipping. If you are looking for bigger quantity, search B01NCOMHLU in top search box. If you are looking for size 6x10, search B00QE4ZY8Y and B01N0TC5F7 in above search box.