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Best Flat Mailers - Holiday Sale

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Last Updated - 16.12.2025

Best Choice

01

WPTrading

WPTrading - Pack of 50 Corrugated Cardboard Mailing Envelopes DIN A4 250 x 353 mm (SW40) Self-Adhesive in Brown - Cardboard Shipping Bag for Books Sending Tear-Resistant - Shipping Packaging for Books

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9.8

Exceptional

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Suitable for: Our cardboard shipping bag is suitable for sending books, catalogues, brochures, calendars and also clothes. In addition, the mailing bags can be used as a maxi letter, large letter, goods shipment or book shipment
Self-adhesive: thanks to the self-adhesive closure on the back and the additional tear-off aid, the mailing bag can be closed and opened effortlessly, quickly and conveniently
Quality from Germany – extra strong and selected micro-corrugated cardboard (1-corrugated; 1.02 F) guarantees tear-resistant and safe shipping and high kink protection for your goods and shipments
Maximum protection – Our high-quality corrugated cardboard envelopes made of extra sturdy and tear-resistant microfibre cardboard guarantees high corner and edge protection for your goods or book shipments
Format: the size of 250 x 353 mm of our mailing bag (outer dimensions) can be easily used for documents, documents, books etc. with the format DIN A4, D4, C4 and B5 (filling height of maximum 25 mm)

29,95 €
02

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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9.7

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

20,99 €
03

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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9.4

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

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 €
Value for Money

04

Wemk

Wemk Shipping Bags Goods Shipment, Pack of 30 Shipping Bags for Vinted, 3 Sizes Mailing Bags Pack, Self-Adhesive and Opaque, Waterproof, Abrasion-Resistant, blue, Modern

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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.
Waterproof plastic shipping bags – Our are made of high-quality polyethylene, which are environmentally friendly, durable and tear-resistant, moisture, dust or dirt. 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.
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.
More economical – Since 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. Besides, they do not need to be folded or assembled, and the bag can be closed much faster.
30 packs in 3 different sizes – with the dimensions 20 x 30 cm (10 pieces) + 25 x 35 cm (10 pieces) + 35 x 45 cm (10 pieces), our envelopes also have a 4 cm wide flap. Please confirm the size before purchasing.

9,99 €
05

Netuno

Netuno Brown Envelopes Corrugated Cardboard DIN B4+ 26.5 x 35.5 cm 354 g Brown Envelopes Cardboard Shipping Envelopes Cardboard Shipping Bags Book Shipping Envelopes Sturdy Pack of 10

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9.0

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

Technical data: 10 brown cardboard envelopes in DIN B4+ format (265 x 355 mm), paper weight: 354 g/m², without window, opening on the short side, straight flap, self-adhesive with peel-off strips
Stable and high quality - Our envelopes are made of high-quality corrugated cardboard with a material thickness of 354 g/m² and are therefore particularly stable and durable. They guarantee that the content will arrive at the destination under optimal conditions.
Perfect protection - The corrugated cardboard mailing bags provide optimal protection for your shipments, whether they are papers, documents or small items. They protect your products from kinks and damage, especially at the corners and edges.
Comfortable and safe - The cardboard envelopes have a self-adhesive closure that gives the shipment even more security during transport. Thanks to the adhesive strip, they are convenient to close and can be opened quickly and easily.
APPLICATION - Our cardboard envelopes are ideal for sending flat content: documents, printed matter or media. They are excellent for sending calendars, catalogues, brochures, magazines, books, certificates, photos, CD, DVD etc.

16,30 €
06

EmballaX

EMBALLAX - 12 Mailing Bags with Pocket for Shipping Label - 2 Sizes XL/XXL - Resistant/Waterproof - Shipping Bags for Clothes - Shipping Envelopes for Boxes - Shipping Bags A4

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8.9

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

[Send stress-free packages!] - Made from high-quality polyethylene, our shipping bags for clothes are ultra tear-resistant and have an inviolable adhesive closure. Its complete opacity and waterproof protects your items from prying eyes and weather influences. Ship your packages worry-free, with the assurance that they arrive in perfect condition.
[OUR 30-DAY MONEY BACK GUARANTEE] - At Emballax, we know you need high-quality envelopes that will save you time and money on each of your shipments. An international inspection office therefore regularly evaluates the quality of our envelopes after their production. We are so confident in their quality that we offer you a 100% SATISFACTION GUARANTEE. If you are not completely satisfied, we will refund the purchase price without any questions.
[ The clever package: cost-effective] - Avoid overlay and save without sacrificing quality. Our shipping bags offer the perfect balance between quantity and performance. With their timeless and beautiful colours, they radiate professionalism and seriousness as soon as they arrive. Stand out, gain customer loyalty and improve your seller rating while optimising your costs!
No loss of time when packaging your packages. - Simplify your shipments with our mailing bags goods shipment, which are quick and easy to use. Put your items in, remove the protective film, flip the tab over, and you're done! Guaranteed secure closure. Practical extra: a bag for inserting the shipping note, which prepares your parcels even faster and more efficiently.
12 envelopes, XL and XXL, with pocket for the shipping label: This generous set is ideal for larger items such as winter jackets, children's duvets, voluminous sweaters, shoe boxes or baby items. Can hold up to 3 kg, these goods shipping envelopes are odourless and can be easily stored. Perfect for managing your high-volume shipments efficiently and without effort.

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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8.6

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

️Frustration-Free Packaging: Easy to open, plastic free and environmentally friendly - perfect for commercial and residential shipments
STURDY & KINK RESISTANT: Heavy duty cardboard envelopes in DIN A5 format - ideal for books, documents, DVDs and more
Versatile: suitable for online retailers, offices, agencies and private frequent shippers
Sustainable and recyclable: environmentally friendly material - fully recyclable and stackable to save space
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

verpacking

verpacking Corrugated Brown Mailing Bags 250 x 353 mm - A4 [Choose Size and Quantity] Cardboard Mailing Envelopes Cardboard Self Adhesive Corrugated Shipping Envelopes Pack of 25

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8.3

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

Wide Application Our 1 corrugated cardboard mailers are suitable for various shipping needs and are a practical solution for your shipping needs.
SUSTAINABLE CHOICE Our shipping envelopes are made from recyclable material, making them an eco-friendly option for your shipping supplies.
Practical format: the envelopes in DIN A4 format (250 x 353 mm) have an opening on the short side and are equipped with a straight flap and self-adhesive.
PACKAGE INCLUDES You will receive 25 pieces of these heavy duty mailers which are great for mailing documents or small items.
Easy to use: the self-adhesive closure allows the bags to be closed quickly, while the tear aid allows for effortless opening.

19,96 €
09

dimapax

Pack of 100 Padded Envelopes Brown All Sizes Available (C3)

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8.1

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

Trifix closure: fixed, adhesive (with the exception of sizes H, I, K) and/or clip closure, perforated closure flaps
This size is ideal for shipping medium goods and goods shipment
Size C/3 | Internal dimensions: 150 x 215 mm | External dimensions: 170 x 225 mm
Safe shipping thanks to shock-absorbing bubble wrap, water-repellent coating and secure self-adhesive closure with removable adhesive strips
Kraft paper, PE 80 g/m² FSC Mix Credit, dimensions: all dimensions are for standard sizes A-CD, according to the specification / with a permissible deviation of +/-3 mm.

19,74 €
10

versando

Versando 100 Folding Envelopes DIN B4 (250 x 353 mm) 4 cm Folded Brown

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8.0

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

without window
Suitable as a large or maxi letter or for book broadcasting
Self-adhesive with cover strips for peeling off
Packed in a box of 100
Pack of 100 folding pockets 250 x 353 x 40 mm kraft paper soda brown, grammage 130 g/m²

19,99 €