We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Stack of white flat mailers in bulk packaging

Partners Brand

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

SKU CH-S1CY-A0FSF

White flat mailers measuring 12 1/4 by 9 3/4 inches, supplied in a pack of 200 for high-volume shipping

  • Product colorWhite
  • White flat mailers protect documents during transit
  • 12 1/4 by 9 3/4 inch size fits standard letter documents
  • Pack of 200 mailers supplies high-volume shipping needs
  • Partners Brand utility mailers deliver reliable everyday performance
  • Flat mailer design stores easily in office spaces

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.

How it compares

Measured against everything we stock in Packing Materials & Shipping Labels, at today’s prices. Recalculated every night.

Price $123.99
Pricier than about 72% of the 3,067 comparable items (median $52.99).

Specifications

Product
Brand namePARTNERS BRAND
Product colorWhite

Questions about this item

How do I seal the 12 1/4 x 9 3/4 mailers, and what step do people often miss?

Peel the adhesive strip, press the flap firmly across the full width, and smooth out air pockets so the bond holds during transit.

Will I need to replace any part of these flat mailers after extended storage?

The adhesive can lose tack if the box sits in heat or humidity for months; store the pack flat in a cool, dry area to keep every mailer usable.

What limit appears first when I pack these mailers to capacity every day?

The 12 1/4 x 9 3/4 dimensions set the maximum contents size; overstuffing stresses the seams and can cause tears before the 200-count pack runs out.

More in Packing Materials & Shipping Labels

Similar items