large mailing bag

Common overall (exterior) sizes shown include 19" x 14.5", 16.1" x 11.6", 15" x 10.5" and 13" x 11". Padded mailers often list interior dimensions separately; an example interior size given is 10.5" x 15".

Most large mailing bags are made from polyethylene or other plastic materials. Many padded options use a poly bubble construction (plastic exterior with interior bubble cushioning) for extra protection.

Common closures include self-adhesive (peel-and-seal) strips and standard self-sealing adhesive strips; some listings show bags with no closure. Several products also advertise tamper-evident seals for added security.

Some poly mailers are gusseted or labeled as expandable to accommodate thicker or bulkier items. For example, expansion poly mailers may feature a gusseted bottom that increases capacity for items like books and binders.

Some product listings include numeric thickness—for example, one expansion poly mailer lists a 3 mil thickness for tear resistance—while others describe the mailers as high-strength or durable without giving a specific mil rating.

A commonly listed interior size for padded bubble mailers in these results is 10.5" x 15".