The 8.5×14.5 15PCS #3 Poly Bubble Mailers Padded Envelopes by gooddeals are plain envelopes made of waterproof polyethylene material. These envelopes feature a bubble-lined interior size of 8.5″ x 13.5″ and an exterior size of 9.5” x 13.5”. Manufactured in the United States, these mailing shipping bags are perfect for protecting and shipping various items securely. With a pack of 15, these envelops offer both durability and convenience for your shipping needs.