A3 & A4 Size Rigid Brown Do Not Bend Kraft Paper Cardboard Envelope
Mailer
Our rigid brown kraft paper cardboard envelope mailers, available
in A3 and A4 sizes, are crafted to redefine reliability in
packaging and shipping. Combining robust protection with
eco-conscious design, they’re built to safeguard your items while
making a sustainable statement.
Ultra-Sturdy Construction: Built to Resist Bending
At the core of these mailers is a thick, rigid kraft paper
cardboard structure—engineered to withstand the rigors of transit.
Unlike flimsy paper envelopes, they maintain their shape even under
pressure, ensuring your contents stay flat and intact. Whether it’s
a framed photograph, a set of blueprints, or a stack of unbound
documents, the “Do Not Bend” embossed reminder reinforces careful
handling, while the rigid build actively prevents creases, folds,
or crushing during sorting, shipping, or delivery.
Tailored Sizes for Every Need
A3 (297 × 420mm): Perfect for large-format items like posters,
architectural plans, art prints (up to 11×17 inches), or oversized
documents that can’t be folded. No more compromising on
presentation—send items in their original form.
A4 (210 × 297mm): Ideal for standard paperwork, certificates,
booklets, small canvas paintings, or even delicate electronics
(like tablets with protective cases). Fits most everyday items
without extra bulk.
Eco-Friendly & Sustainable
Made from 100% recycled kraft paper, these mailers are
biodegradable and fully recyclable—aligning with green initiatives
for businesses and eco-aware individuals. The natural brown hue
reflects minimal processing, avoiding harmful dyes or chemicals,
while the material’s inherent strength means you don’t need
excessive packaging to keep items safe. Reduce your carbon
footprint without sacrificing quality.
User-Friendly Design Details
Secure Self-Adhesive Closure: A strong, tamper-resistant adhesive
strip ensures a tight seal with just a press—no need for tape or
glue. It stays closed through rain, humidity, or rough handling.
Easy Labeling Surface: The smooth kraft paper exterior accepts ink,
stickers, or stamps effortlessly, so addresses and shipping labels
stick firmly and remain legible.
Lightweight Yet Durable: Despite their rigidity, these mailers are
lightweight, helping keep shipping costs low while maintaining
maximum protection.
Versatile for Every Scenario
From businesses shipping contracts, product catalogs, or art
prints, to individuals sending family photos, diplomas, or handmade
crafts—these mailers adapt to any need. They’re also a favorite
among photographers, artists, and designers who need to ensure
their work arrives in pristine condition.
Trust in a mailer that protects what matters, respects the planet,
and simplifies your shipping process. Choose our A3 & A4 Rigid
Brown Kraft Envelope Mailers for reliability you can see and feel.
