Partners Brand Express Pouch Mailer 12 x 9.5 White Pack 250

Express Pouch Mailer for shipping

This white express pouch mailer measures 12-1/2 by 9-1/2 inches and ships in a pack of 250. It is built for businesses that send flat items such as documents, catalogues or clothing on a daily basis. The lightweight construction keeps postal costs low while protecting contents from moisture and tearing during transit.

Limits of the poly mailer format

The pouch relies on a self-seal adhesive strip that cannot be resealed once opened. It offers no rigid structure, so fragile objects or items thicker than the envelope depth will not ship safely. Extreme temperatures may affect adhesive performance, and the white surface shows dirt or handling marks more readily than darker colours.

Quick to pack with a common pitfall

Peel the liner, press the flap firmly, and the parcel is ready for the carrier — no tape or heat sealer required. The most frequent error is overstuffing the mailer, which prevents the adhesive from bonding across the full width and causes the package to burst open in the sorting network.