Partners Brand RMU129W White Flat Mailers 12 1/4 x 9 3/4 PK200

White Flat Mailers for High-Volume Shipping

These white flat mailers measure 12 1/4 by 9 3/4 inches and come in a pack of 200. They are designed for businesses that send flat documents, catalogues or lightweight merchandise regularly. The bulk quantity supports continuous mailing operations without frequent reordering. Offices, warehouses and e-commerce sellers will find the size practical for standard flat-rate shipping.

Lightweight Construction Keeps Postage Costs Low

The flat, paper-based mailers add minimal weight to shipments, helping to control postage expenses on every parcel. Their thin profile allows large batches to be stored flat on shelves or in drawers without consuming significant space. Handling is quiet and clean, producing no dust or debris during packing. The simple construction requires no special equipment to seal or process.

Self-Seal Closure Speeds Up Packing Workflow

Each mailer features a built-in adhesive strip that closes securely without tape or staplers, reducing packing time per order. The white exterior provides a clean surface for handwritten addresses or printed labels. The 200-count pack arrives in a single carton that opens easily for quick access at the packing station. This format suits operations that value speed and a professional presentation.