Bubble Pouches 8 x 11.5 -Inches - These self-sealing envelopes are designed to keep your valuables safe. With dimensions of 8" x 11.5", they strike the perfect balance between size and convenience. Made of durable polyethylene, these bubble pouches provide cushioning for fragile items. The small-sized bubbles (3/16 inch) create a protective layer against vibrations, bumps, and chips.