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 one hundred white flat mailers eleven by thirteen and a half inches

Partners Brand

Partners Brand RM3W Flat Mailers 11 x 13-1/2 White PK100

SKU CH-0GD3-F5YFD

White flat mailers measuring 11 x 13-1/2 inches, supplied in a pack of 100 for shipping documents and flat items

  • ColorWhite
  • 11 x 13-1/2 in size fits large documents flat
  • White surface gives a clean professional look
  • Pack of 100 covers high-volume mailing needs
  • Flat mailer design protects contents from bending
  • Partners Brand quality for reliable shipping supplies

Flat Mailers 11 x 13-1/2

These flat mailers measure 11 by 13-1/2 inches and come in a pack of 100 white units. They are designed for shipping documents or flat items that require rigid protection. The bulk quantity suits businesses or frequent shippers managing regular outbound mail.

Standard paper construction

The mailers use standard paper stock without padded lining or reinforced edges. They offer basic stiffness for flat contents but no cushioning for fragile objects. Noise and power draw are not applicable to this stationary mailing supply.

Pack of 100 white units

The package quantity of 100 is the key specification for procurement planning. Buyers needing smaller counts or padded bubble mailers for fragile goods should look elsewhere. This product addresses high-volume flat shipping needs only.

Highlights

  • 11 x 13-1/2 in size fits large documents flat
  • White surface gives a clean professional look
  • Pack of 100 covers high-volume mailing needs
  • Flat mailer design protects contents from bending
  • Partners Brand quality for reliable shipping supplies

Specifications

BrandPARTNERS BRAND
ColorWhite

Questions about this item

How do I seal the 11 x 13-1/2 flat mailer and what step do people skip?

Peel the adhesive strip, press firmly across the full width, and smooth out air pockets; the step often missed is applying even pressure along the entire flap so the bond holds during transit.

Will the white 11 x 13-1/2 mailers yellow or degrade in storage before I use all 100?

Stored flat in a cool, dry place away from direct sunlight, the paper stock stays white and the adhesive remains tacky for years; humidity and heat are the only factors that shorten shelf life.

At what weight does the 11 x 13-1/2 flat mailer start to tear or the seal fail under sustained shipping?

The mailer is rated for typical documents and lightweight goods up to roughly one pound; heavier contents stress the side seams and adhesive first, causing tears or popped seals.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.