These 12 x 15 x 3 inch kraft expandable self-seal envelopes are built from 40 lb paper stock with a peel-strip adhesive closure that requires no moisture or sealing equipment. A protective tear strip keeps the adhesive clean until use, extending shelf life in warehouse and stockroom environments.

The 3" side gussets allow the envelope to expand for catalogs, multi-piece flat goods, light apparel, promotional kits, and other contents too thick for standard flat mailers. End-loading construction supports fast insertion at high-throughput packing stations, making these envelopes a practical fit for e-commerce fulfillment, retail distribution, and manufacturing shipping departments.

Sold in cases of 250 envelopes, parcel-friendly for standard replenishment orders.