Flat Mailer Bags 14.5" x 19"

These 14.5" x 19" inches biodegradable mailer bags are the perfect solution for environmentally-conscious shipping. Made from biodegradable materials, these bags break down in a matter of months, rather than the decades it takes for traditional plastic mailers. They are strong and durable, able to protect your items during transit while also reducing your carbon footprint.

They are suitable for variety of items such as clothing, books, and small electronics. These bags are easy to use and reuse (thanks to the double adhesive strips being rolled out to all prints by the end of 2023), making them an ideal choice for businesses and individuals looking to reduce their environmental impact.

Filter and sort 12 products
Availability
Price
The highest price is $500.00
$
$
Labels
Mailer size
Sort by
A woman holding a stack of pillows in her Mustard Leaf Biodegradable Mailers 14.5" x 19" office by impack.co.

MAILERS FOR bigger orders AND bulkier items | 14.5” × 19” flat mailers

Made for your bigger shipments

You won’t need to stock multiple box types or waste filler — just one strong, flexible mailer.

Shop Now

A mailer that does everything

Packaging that’s smart, stylish, and sustainable. All in one.

A yellow, flexible square shape is stretched outward with four red arrows pointing toward each corner from the center.

Extra capacity

Roomy and versatile. Fits bulkier items without overpacking.

A digital illustration of a pink-handled paintbrush with a brown bristle tip on a plain white background.

Instantly stylish

Look branded without spending on custom prints and high MOQ.

A pink piggy bank with a gold coin being inserted into the slot on its back, shown against a plain background.

Save more on shipping fees

Pack a large capacity without box weight.

Illustration of a flexed human arm showing a prominent bicep muscle on a plain white background.

Extra durable

Tear-resistant, waterproof, and strong enough for bulk orders and long transits.

Illustration of a stopwatch with the hand pointing straight up at 12 o'clock, featuring a dark outer rim and orange button and hand.

Faster packing

Built-in adhesive strips make packing a breeze. Just peel, seal, and send.

A person holds out a green, square-shaped package decorated with leafy and star patterns.
Two black packages with white and gold star and moon patterns rest on a wooden floor next to a plush crescent moon and two small white star pillows.
A person in a dark shirt holds a large, orange, patterned package with both hands in front of green foliage.
A woman wearing a green cardigan and black overalls smiles while holding a stack of assorted colored packages.
Three plastic packages are stacked on a doormat in front of a door.
A person holds out a green, square-shaped package decorated with leafy and star patterns.
Two black packages with white and gold star and moon patterns rest on a wooden floor next to a plush crescent moon and two small white star pillows.
A person in a dark shirt holds a large, orange, patterned package with both hands in front of green foliage.
A woman wearing a green cardigan and black overalls smiles while holding a stack of assorted colored packages.
Three plastic packages are stacked on a doormat in front of a door.

No folding corners, no crushed edges.

What fits in a  14.5" x 19" mailer?

Multiple clothing items, yarn, stuffed toys, blankets, books, or bundled items.

Badge heading

Materials & eco facts

Our flat mailers are made using D2W technology, a smarter alternative to traditional plastic that helps reduce long-term waste. Want to learn more about our materials? Click here.

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.
A sealed black and orange package with illustrations and a sticker label featuring a sewing machine logo and website address. A sheet of similar stickers lies nearby.

Rotate mailer designs to match your launches

Seasonal Switch-Up

Keep your packaging fresh year-round with limited seasonal prints for Christmas, Valentine’s, or Halloween.

Loved by small shops

Join a community of makers, boutique owners, and online sellers who’ve switched to packaging that looks better and feels better. See all reviews here.

Not sure if 14.5” x 19” fits your product?

Use our Mailer Bag Size Calculator to find the right match before checkout.

You need a size _" x _" or larger
Calculate Manually
inches cm
measuring items to ship
Length: inches
Width: inches
Height: inches

Best paired with

All glassine bags are sized to fit perfectly inside our eco mailers.

Flat Mailer FAQs

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'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.