The kraft bubble mailer combines durable paper appearance with bubble interior protection, in a width that already accepts larger card formats and softcover books. This 40-piece pack is recommended for those shipping medium-sized, mostly flat products — small publishers, makers and creative businesses.
What is included in the 40-piece pack
The pack contains 40 kraft bubble mailers, each with an outer dimension of 165×225 mm and an additional 40 mm closure flap. The total weight is approximately 0.97 kg, and a single mailer weighs around 22 grams. The mailers arrive in a flat bundle, in a form well suited to space-saving storage.
Material and bubble lining
The outer layer is made from durable kraft paper, which, thanks to its natural brown tone, gives an immediately recognisable rustic appearance. Kraft paper is particularly resistant to tearing and creasing, so it retains its shape during postal handling. Inside, an HDPE-based bubble lining absorbs shocks and vibrations through evenly distributed air cells. Combined, the two layers provide reliable two-layer protection.
Size and use
The 165×225 mm outer dimension is particularly practical for items around B6 or below A5 format. It fits a softcover novel or notebook, a thicker stack of cards, a mini clothing item (such as folded socks or a scarf), a medium-sized cosmetic product (a cream jar, a perfume sample set), creative supplies or 1-2 small textile samples. For webshops that handle books, cosmetics and small clothing alike, this is an everyday size.
Closure and opening
The +40 mm flap has a self-adhesive strip on its inner side. After removing the protective tape, the flap closes in a single motion, providing a durable, tamper-evident seal. The recipient opens the envelope along the flap with a tearing motion. The seal is single-use: once opened, it does not re-stick with sufficient security.
Storage and durability
Store the mailers as a flat bundle in a dry, cool location, away from direct sunlight. Humid environments and high temperatures gradually weaken the adhesive strip. With proper storage the 40-piece bundle remains ready to use for many months.