Superior Barrier Bubble? air cellular cushioning offers great protection. Fully laminated, heavyweight Kraft construction delivers outstanding rip- and puncture-resistance. Seamless bottom provides extra strength and stability. Self-adhesive closure produces a secure, peel-and-press seal. This product was made from wood sourced from a certified managed forest. Envelope Size: 8 1/2 x 12; Envelope/Mailer Type: Cushioned; Closure: Self-Adhesive; Trade Size: #2.