Best Flat Mailers 2026

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Last Updated - 27.03.2026

Best Choice

01

druck.de

1,000 Envelopes - C5/6 DIN Long Envelope with Window - 110 x 220 mm - White Paper Envelopes - Self-Adhesive - Envelope for Bills, Letters, Weddings, Greeting Cards, Invitations

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Thanks to the modern and high-performance machinery in Burgenland, our manufacturer ÖKI ensures incomparable quality from Austria.
Self-adhesive with adhesive strips for easy enveloping. Note: Mailing bags have the flap with adhesive strips on the short side, envelopes have the adhesive strip on the long side.
Pure white envelope for professional applications. With high-quality 80 g paper, your contents remain well packaged and protected from prying eyes.
Available with or without window. Windows are suitable for invoices with printed letterhead. Here you can see the address of the receiver through the transparent window.
Available in various sizes. From B4 pockets to C6 envelopes, you will find the right size for your occasion. Certificates that must not be folded are best sent in C4. C5/6 is suitable for everyday shipments that may well be folded.

27,96 €
02

verpacking

verpacking Folding Envelopes 350 x 250 x 50 mm with Block Base, Double Peel and Tear Thread Mailing Bag (Pack of 50)

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Versatile shipping - The bag with block bottom offers extra space, flexibly adapts to the contents and thus reduces packaging material, volume, weight and waste.
Versatile - They are especially used for variable filling quantities, as the base adapts to the filling material.
User-friendly - Our mailing bags are made of high-quality material and are therefore particularly tear-resistant and reliable.
Multiple uses: thanks to the self-adhesive and tear thread, the packaging is quick to close and open and can be easily closed again with the second adhesive strip.
MAILERS - Our sustainable kraft 120gsm mailers offer an environmentally friendly alternative to the conventional plastic mailer.
Locking mechanisms - With a double adhesive strip, the bags are resealable and ideal for returns or re-use.
LARGE CAPACITY - Bifold bags are used where narrow mailers offer too little volume for the goods.
Kraft paper is not only particularly strong (120 g/m²), but also protects the contents from prying eyes.
IDEAL - Our sustainable mailers are the ideal solution for environmentally conscious shippers who value sustainability.
Box contents & details - Folding bags (350 x 250 x 50 mm), pleated mailers with 2 peel and tear strip, recyclable packaging, pack of 50

27,75 €
03

progressPACK

progressPACK Premium PP W01.04 Shipping Envelopes - Corrugated Cardboard - DIN A4+ - 235 x 337 x 35 mm - Pack of 25 - Brown

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Item Package Weight:3.1 oz
Inner dimensions: 235 x 337 x 35 mm
External dimensions: 352 x 250 x 40 mm
Brand: progressPACK

22,89 €
Value for Money

04

progressPACK

progressPACK Premium PP W01.04 Shipping Envelopes - Corrugated Cardboard - DIN A4+ - 235 x 337 x 35 mm - Pack of 25 - Brown

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Item Package Weight:3.1 oz
Inner dimensions: 235 x 337 x 35 mm
External dimensions: 352 x 250 x 40 mm
Brand: progressPACK

22,89 €
05

Wemk

Wemk Mailing Bags, Pack of 45 Shipping Bags for Vinted, 3 Sizes Mailing Bags Pack, Waterproof, Opaque, Abrasion-Resistant, Postal Bags, Logistics Packaging, Blue

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9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Your online shop support: the timeless and refined colours of our mailing bags, together with the word "thank you" in several languages, make you unforgettable. Stand out from the competition. The smooth surface of the shipping bag can write your greetings, labels, DIY text or leave markings on the packaging.
Save money – as the mailing bags are waterproof, you don't have to worry about your items getting wet even on rainy days. In addition, our plastic bags are feather-light, so you can save on shipping costs. Say goodbye to old-fashioned packages and welcome speed.
Perfect for various shipping requirements – perfect for shipping clothes, boxes, shoes, boxes. Perfect for mail, mailer, vinted online stores, envelopes and packages, clothes and gifts, also can be used as gift wrapping for Halloween, Thanksgiving, Christmas, birthdays.
High-quality materials – Our are made of high-quality polyethylene, which is environmentally friendly, durable and tear-resistant. The opaque material prevents the contents from being visible from the outside and ensures the confidentiality of your shipments. Each bag is equipped with a strong adhesive strip that ensures a secure and durable closure.
45 packs in 3 different sizes – with the dimensions 20 x 30 cm (15 pieces) + 25 x 35 cm (15 pieces) + 35 x 45 cm (15 pieces), our envelopes also have a 4 cm wide flap. Please confirm the size before purchasing.

10,99 €
06

Wemk

Wemk Mailing Bags, Pack of 45 Shipping Bags for Vinted, 3 Sizes Mailing Bags Pack, Waterproof, Opaque, Abrasion-Resistant, Postal Bags, Logistics Packaging, Blue

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Your online shop support: the timeless and refined colours of our mailing bags, together with the word "thank you" in several languages, make you unforgettable. Stand out from the competition. The smooth surface of the shipping bag can write your greetings, labels, DIY text or leave markings on the packaging.
Save money – as the mailing bags are waterproof, you don't have to worry about your items getting wet even on rainy days. In addition, our plastic bags are feather-light, so you can save on shipping costs. Say goodbye to old-fashioned packages and welcome speed.
Perfect for various shipping requirements – perfect for shipping clothes, boxes, shoes, boxes. Perfect for mail, mailer, vinted online stores, envelopes and packages, clothes and gifts, also can be used as gift wrapping for Halloween, Thanksgiving, Christmas, birthdays.
High-quality materials – Our are made of high-quality polyethylene, which is environmentally friendly, durable and tear-resistant. The opaque material prevents the contents from being visible from the outside and ensures the confidentiality of your shipments. Each bag is equipped with a strong adhesive strip that ensures a secure and durable closure.
45 packs in 3 different sizes – with the dimensions 20 x 30 cm (15 pieces) + 25 x 35 cm (15 pieces) + 35 x 45 cm (15 pieces), our envelopes also have a 4 cm wide flap. Please confirm the size before purchasing.

10,99 €
07

kraftmax

50 x kraftmax Premium Packaging / Mailing Bags - Frustration-Free Cardboard Envelopes - DIN A5 - 23.5 x 18 cm

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8.5

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

️Frustration-Free Packaging: Easy to open, plastic free and environmentally friendly - perfect for commercial and residential shipments
Versatile: suitable for online retailers, offices, agencies and private frequent shippers
Sustainable and recyclable: environmentally friendly material - fully recyclable and stackable to save space
STURDY & KINK RESISTANT: Heavy duty cardboard envelopes in DIN A5 format - ideal for books, documents, DVDs and more
Format and quantity: DIN A5 (approx. 23.5 x 18 cm) - Available in 50, 100, 200 or 500 pieces depending on your needs

16,94 €
08

kraftmax

50 x kraftmax Premium Packaging / Mailing Bags - Frustration-Free Cardboard Envelopes - DIN A5 - 23.5 x 18 cm

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8.2

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

️Frustration-Free Packaging: Easy to open, plastic free and environmentally friendly - perfect for commercial and residential shipments
Versatile: suitable for online retailers, offices, agencies and private frequent shippers
Sustainable and recyclable: environmentally friendly material - fully recyclable and stackable to save space
STURDY & KINK RESISTANT: Heavy duty cardboard envelopes in DIN A5 format - ideal for books, documents, DVDs and more
Format and quantity: DIN A5 (approx. 23.5 x 18 cm) - Available in 50, 100, 200 or 500 pieces depending on your needs

19,90 €
09

kraftmax

50 x kraftmax Premium Packaging / Mailing Bags - Frustration-Free Cardboard Envelopes - DIN A5 - 23.5 x 18 cm

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7.9

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

️Frustration-Free Packaging: Easy to open, plastic free and environmentally friendly - perfect for commercial and residential shipments
Versatile: suitable for online retailers, offices, agencies and private frequent shippers
Sustainable and recyclable: environmentally friendly material - fully recyclable and stackable to save space
STURDY & KINK RESISTANT: Heavy duty cardboard envelopes in DIN A5 format - ideal for books, documents, DVDs and more
Format and quantity: DIN A5 (approx. 23.5 x 18 cm) - Available in 50, 100, 200 or 500 pieces depending on your needs

16,09 €
10

Blanke Briefhüllen

Cardboard Backed Envelopes C4 229 x 324 mm White Pack of 100 without Window Self-Adhesive with Peel-Off Strips Straight Flap 120 g/m² Offset Blanke Briefhüllen

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7.6

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

UNIVERSAL SIZE - The C4 size (324x229mm) is perfect for A4 documents without the need to fold them. Ideal for businesses, offices, law firms and home use.
STRONG & STURDY - This high-quality cardboard back pocket (DIN C4) provides optimal protection for your important A4 documents. Thanks to the reinforced back panel made of sturdy cardboard, your contents remain kink-free and safe.
PERFECT FOR SHIPPING - Ideal for safely sending contracts, certificates, certificates, applications, photos and other sensitive documents. The rigid back panel provides additional protection against damage.
HIGH QUALITY MATERIAL - The mailing bag is made of durable white paper with a sturdy cardboard insert that ensures kink free delivery. The self-adhesive adhesive closure makes it easy to seal and saves time.

26,95 €