Gusseted Self-Seal Stayflat® Mailers

Mailers / Expand-a-Mailer™
Expansion Mailers provide more mailing capacity with our expansion mailers!
Expand-A-Mailers are designed for those situations when you’re sending out thick, bulky items, like books, manuals or catalogs.
1 - 5 working days


  • For larger items that require expandable mailers
    • Bulky Soft Goods
    • Mail Order
    • Clothing
    • Promo Items
    • Forms
    • Non-Fragile Items
    • Bulky items such as books, manuals, or, catalogs


  • Built in corner protection
    • Protects contents and resists bending
  • Pressure sensitive closure with tear strip opening
    • Provides tamper evident security
    • Easy to open
  • Booklet style construction (side loading)
    • Makes for easy fulfillment
  • Custom sizes and printing
    • Our design team can create a custom size or style
    • Printing from simple 1 color up to 9 colors, 1 color can be on backside
  • Customizable at LOW QUANTITIES


  • Material thickness: 0.020" CCNB
  • Environmentally responsible
    • Made of 100% Recycled paperboard (0.020" CCNB) with a minimum of 35% Post Consumer Content
    • 100% recyclable

Download Templates / Information

Just a second...


Click one of the configurations to see its details