#2 8. 5x12 Padded Envelopes are 2. 5 mil high quality tough; puncture, tear, and water resistant and quality bubble provides extra protection during transit. White bubble envelopes with labels or why not just write on them if you want to save time and cost. Each 8. 5 x 12 envelope mailer has a unique 2. 5 mil thickness. As the sender all you have to do is peel off the self-seal strip on the opening lip and fold over to make a permanent seal. 8. 5x12 Bubble Envelopes #2 mailers are perfect for fragile items: brochures, catalogs, books, bulky material, gifts, presents and electronic media. Cushion Bubble mailers is high-quality self-sealing bubble mailer envelopes, lightweight, which saves on postage fees. Available in a wide range of sizes. Inner Dimensions: 8. 5 x 11 inches Bubble Poly Bag Outside Dimension: 8. 5 x 12 inches Bubble Poly Bag Color: White Poly Bag Type: #2 Bubble Mailer - Poly / Mailing Bag Seal Type: With Adhesive easy close strip Outside Width: 8. 5 inches bubble envelopes Outside Length: 12 inches bubble envelopes Usable Width: 8. 5 inches bubble envelopes Usable Length: 11 inches bubble envelopes Quantity: 100 Poly Bubble Envelopes,