Say goodbye to wasteful shipping with our fun and earth-friendly 10"x13" biodegradable mailer bags. It has double adhesive strips which makes it reusable! Perfect for both personal and business use, these bags are designed to fit standard documents and small packages, and will break down naturally in the environment. Trust in their durability and secure closure to keep your items safe during transit.
Small, sleek, and ready to seal | 10x13 FLAT MAILERS
Your go-to standard mailer bag
Some sizes just get it right. Meet your new favorite packaging. Our 10x13 mailers are durable, reusable, and eco-friendly — the perfect standard size for small business shipping.
Packaging that’s smart, stylish, and sustainable. All in one.
The perfect fit
Just the right mailer size. No wasted space, no wasted money.
Save on shipping fees
Slim and lightweight means lower postage costs and easier handling every time you send.
Strong protection
Thick, tear-resistant, and weather-safe for every shipment.
Faster packing
Built-in adhesive strips make packing a breeze. Peel, seal, and send.
say goodbye to expensive custom mailers
Good packaging, guaranteed.
Available in different prints. Choose from floral, minimal, or seasonal designs that make your customer go “where did you get this bag?”
It’s the easiest upgrade you’ll ever make for your brand.
What fits inside the 10x13 mailer?
1–2 folded shirts or tops. A5 to A4 notebooks and stationery, bundled sticker sets or small prints, pouches, scrunchies, and light accessories.
Materials & eco facts
Planet-friendly packaging
Our flat mailers are made using D2W technology, a smarter alternative to traditional plastic that helps reduce long-term waste.
D2W mailers are made with an added eco-degrading agent that helps them safely decompose into water, carbon dioxide, and biomass within about 2 years (depending on conditions). This means that even if they don’t make it to a recycling center, they won’t linger in landfills or harm the environment for generations.
The bags stay durable and protective during shipping.
They break down much faster than regular plastics.
They leave no harmful microplastics behind.
We always encourage you to recycle your mailers first by dropping them off at your nearest flexible plastic recycling point. But even if they don’t make it there, you can feel good knowing that your packaging won’t stay on this planet forever.
Rotate mailer designs to match your launches
Seasonal Switch-Up
Match your mailers to the season with our special prints for Christmas, Halloween, Valentine’s Day, and more!
Loved by small shops
Proven by real feedback from real shop owners. See all reviews here.
"Favorite Mailers!"
These are my absolute favorite mailers. I used them for everything. Please bring back the 100 pack order size for the Midnight Galaxy mailers
Anonymous
"So Beautiful !!"
These mailers are so dreamy !! beautifully designed and well made that everytime I got them I'm so excited !! Just WoW!! They are just PERFECT !! Thank you impack ^-^
RAOUIA
"Impressed"
Wasn't sure what to expect but very happy with the bags and the matte feeling of them. They feel thick and have been doing just fine holding up shipping so far with no issues.
Lorena V.
"Love these mailers!!"
Great quality. Beautiful design. I LOVE elevating what I send to clients in these lovely mailers!! It's the first impression for what I send, and I couldn't be happier.
The C.H.
Flat mailer size calculator
Not sure if the bag would fit? Enter your package measurements and get an estimate on the bag size you’ll need.
Here are the most common things people ask about our flat mailers!
What’s the difference between a flat mailer and a bubble mailer?
Flat mailers are lightweight and flexible with no bubble lining, perfect for keeping shipping costs low. Bubble mailers, on the other hand, have an internal cushion that protects fragile items like jewelry, cosmetics, or small electronics.
Are your mailers waterproof?
Our biodegradable mailers are water-resistant, offering protection from light moisture and short rain exposure. For extra protection, you can add an inner glassine bag or tissue wrap.
Can I order mixed sizes or designs?
You can try our Sample 10 Pack, which includes a mix of designs and sizes — perfect if you want to test which one fits your products best before bulk ordering.
How do I store mailers properly?
Keep them in a cool, dry place away from direct sunlight. Like most biodegradable materials, they can start breaking down if stored for too long under heat and humidity. We recommend using them within a year.
Can glassine be recycled?
Yes. Our glassine is 100% curbside recyclable with other paper products.
What makes Impack mailers unique?
Our mailers combine function and design — all pre-designed, biodegradable, and equipped with double adhesive strips for easy reuse. Small shops love them because they eliminate the need for custom printing and help create a branded unboxing experience instantly.
Our glassine bags work for products big and small, since they come in a range of sizes. Use them for everything from stationery, jewellery, and small accessories to apparel add-ons, dry food items, and other products that benefit from a clean, semi-transparent presentation.
Can't find what you're looking for?
Due to high demand, occasionally some of our products do go out of stock. We are constantly monitoring our stock levels, and we usually expect to replenish any product line within a couple of weeks.
If you want to know when something will be restocked, we highly recommend you click the "Notify Me When Available" button, enter your email address, and we’ll send you an alert as soon as the item is back in stock. Here's a quick guide on how to do it.
