Size: #5 10.25 x 15.25 Poly Bubble Mailer with Self Seal (100 Qty) These popular padded envelopes are sturdily built with bubble lined wall construction for extra protection during transit. These tough premium shippers are proven solutions for a wide variety of items. Durable and moisture-resistant, with exceptional puncture resistance, tear strength, and cushioning performance. The self-seal closure provides a reliable, tamper-evident seal to secure all enclosures, while being opaque, the exterior film creates a crisp, professional image for your company.