Mailer Envelopes, Material Poly, Mailer Type Bubble, Closure Style Self Sealing, Color White, Usable WxL 10 1/4 in x 15 in, Usable Width 10 1/4 in, Usable Length 15 in, Outside WxL 10 1/2 in x 16 in, Outside Width 10 1/2 in, Outside Length 16 in, Mailer Number #5, Bubble Size 3/16 in, Material Thickness 0.245 in, With Tear Strip No, Pre-Printed Address Lines No, Package Quantity 100 Poly bubble mailers resist tearing and protect the contents from moisture and water. A self-sealing closure secures the contents in the envelope for shipment. The bubble liner protects items from damage during shipment.Bubble mailers have a plastic bubble liner to provide some cushioning and padding around items. These mailing envelopes protect the contents of the package and help prevent breakage during shipme.