5 1/8 x 5 1/8" White Self-Seal Stayflats Plus® Mailers

Stayflats Plus® White Self-Seal Mailers deliver rigid, stay-flat protection for square flat items without requiring additional stiffeners or padding inserts. Built from lightweight chipboard, the 5-1/8 x 5-1/8 inch interior holds its shape through the shipping process, ensuring contents arrive without bends, creases, or crush damage.

The peel-and-seal adhesive strip closes securely without tape or sealing equipment, while a pull-tab tear strip on the receiving end allows for clean, damage-free opening. The white exterior surface accepts direct labeling and printed postage, making these mailers suitable for direct-to-consumer e-commerce, photography studios, greeting card fulfillment, and administrative document distribution.

Each case contains 200 mailers. The square format accommodates standard photo prints, folded cards, and similarly sized flat media. These mailers ship via parcel carrier and are designed for flat or low-profile products.