10 Best Small Postage Boxes Large Letter in The UK

Last updated on 22/07/2025

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Best Choice

9.7

Exceptional

AKAR

A4/C4 || 320x230x20mm || Large Letter Postal Boxes - A4 & C4 Sizes - Pack of 50

Why We Love It

Eco-friendly and cost-saving.
Quick to assemble.
More protection for items.

Main Highlights

LARGE LETTER PIP POSTAL BOXES : Cardboard large letter postal boxes designed for shipping. Suitable for sending fragile items when used with proper packaging. Made from durable single-wall corrugated cardboard. Manufactured in the UK and 100% recyclable. Dimensions: 320 x 230 x 20mm.
HIGH QUALITY LARGE LETTER BOXES : The C4 Size shipping box is made of recyclable corrugated cardboard, which is lightweight but sturdy, ensuring your stuff safety. you can use the boxes as gift boxes, just need some ribbons to make the decorated package more unique. The box has a locking tab at the front allowing it to secure the box. These are commonly used for small products or gifts , stationery, retail and e-commerce, and cards.
ALL PURPOSE CARDBOARD SHIPPING MAILING POSTAL PIP BOXES : Cardboard boxes cartons C4 large letter pip boxes are an easy way for Mailing , Postage , PIP , Large Letter , Parcel , Shipping , Posting , Delivery , Mail for home , office , workplace , business and commercial with our all-purpose flatpack cardboard postal box.
PROTECTIVE PACKING MATERIAL QUICK ASSEMBLE : Keep your items safe with our strong heavy duty flat pack cardboard postage boxes also known as large letter parcel postal boxes . Stackable , Easy to fold , Easy to assemble, Easy to carry and effective. No tape, glue, staples needed, can be folded in seconds.
HEAVY-DUTY POSTAL BOXES FOR SHIPPING : All our brown cardboard postal boxes C4 are supplied flat packed for transit and delivery and can be used without tape. Suitable for gift packaging, e-commerce shipping, or storage purposes. Our shipping boxes offer amazing strength and durability. They provide more protection than standard mailers, ensuring the contents stay secure during transit.

50X C4 A4 Size Box Large Letter Strong Cardboard Shipping Mailing Postal Pip, LGELETBOXC4005

Why We Love It

Quick and easy assembly.
Large letter qualifying size.
Durable single wall cardboard.

Main Highlights

Brown C4/A4 pricing in proportion (pip) cardboard postal boxes
Delivered flat-packed, securely wrapped
Quick and easy to assemble, sealable with clear/brown tape
A4/C4: external size: 345Mmm x 240mm x 22mm (13.6" X 9.5" X 0.8") - Large Letter qualifying
Made from a hard 1.2mm thick single wall cardboard

218x159x20mm || A5/C5 || PACK OF 50 || AKAR Corrugated Manila large letter Postal Box C5 A5 Postal Boxes Royal Mail PIP Boxes C5 Box Strong Cardboard Boxes C5 Large Letter Box pip postal boxes

Why We Love It

Eco-friendly and cost-saving.
Quick and easy assembly.
Flat-packed and lightweight.

Main Highlights

LARGE LETTER PIP POSTAL BOXES : Cardboard large letter postal boxes designed for shipping. Suitable for sending fragile items when used with proper packaging. Made from durable single-wall corrugated cardboard. Manufactured in the UK and 100% recyclable. Dimensions: 218 x 159 x 20mm.
HIGH QUALITY LARGE LETTER BOXES : The C5 Size shipping box is made of recyclable corrugated cardboard, which is lightweight but sturdy, ensuring your stuff safety. you can use the boxes as gift boxes, just need some ribbons to make the decorated package more unique. The box has a locking tab at the front allowing it to secure the box. These are commonly used for small products or gifts , stationery, retail and e-commerce, and cards.
ALL PURPOSE CARDBOARD SHIPPING MAILING POSTAL PIP BOXES : Cardboard boxes cartons C5 large letter pip boxes are an easy way for Mailing , Postage , PIP , Large Letter , Parcel , Shipping , Posting , Delivery , Mail for home , office , workplace , business and commercial with our all-purpose flatpack cardboard postal box.
PROTECTIVE PACKING MATERIAL QUICK ASSEMBLE : Keep your items safe with our strong heavy duty flat pack cardboard postage boxes also known as large letter parcel postal boxes . Stackable , Easy to fold , Easy to assemble, Easy to carry and effective. No tape, glue, staples needed, can be folded in seconds.
HEAVY-DUTY POSTAL BOXES FOR SHIPPING : All our brown cardboard postal boxes C5 are supplied flat packed for transit and delivery and can be used without tape. Suitable for gift packaging, e-commerce shipping, or storage purposes. Our shipping boxes offer amazing strength and durability. They provide more protection than standard mailers, ensuring the contents stay secure during transit.

MEG4TEC 50 x BROWN CARDBOARD BOX SQUARE, SIZE: 10cm x 10cm x 2cm. SHIPPING MAILING PIP LARGE LETTER

Why We Love It

Compact and lightweight design.
Strong and durable material.
Perfect for secure shipping.

Main Highlights

50 x BROWN CARDBOARD BOX SQUARE, SIZE: 10cm x 10cm x 2cm. SHIPPING MAILING PIP LARGE LETTER
EXTERNAL SIZE: 11.5cm x 10.5cm x 2.2cm (4.5" x 4" x 0.8")
INTERNAL SIZE: 10cm x 10cm x 2cm WEIGHT: 22g
MADE FROM A STRONG 1mm THICK SINGLE WALL CARDBOARD
SECURELY WRAPPED

MEG4TEC 20 Pack White Cardboard Shipping Boxes C5 A5 PIP Large Letter Postal Mailing Box - Internal Size: 22.5cm x 16cm x 2cm

Free Shipping

Why We Love It

Sturdy protection for contents.
Environmentally friendly and recyclable.
Convenient large letter sizing.

Main Highlights

Pack of 20 White C5/A5 Pricing in Proportion (PIP) Brown Cardboard Postal Boxes
Internal Size: 22.5cm x 16cm x 2cm, Weight: 34g
External Size - 9" x 6.5" x 0.8
Large Letter Qualifying
Fully Recyclable Packaging

C5 A5 Royal Mail Large Letter PIP Boxes, 220x160x20mm Corrugated Cardboard Shipping Boxes, Brown Small Postal Packaging Mailing Boxes for Business, Posting, Storing or Gift (Pack of 10)

Free Shipping

Why We Love It

Perfect for small gifts.
Eco-friendly and sturdy design.
Easy to assemble and store.

Main Highlights

Pack, Ship, Mail, or Store small items in these cartons, they make the perfect box for those little products or gifts that need to be sent out or stored until ready to use
Made from strong 32ECT-E single wall corrugated kraft cardboard which is Eco-friendly, recyclable and sturdy for daily use
Outer size: 23cm x 16.3cm x 2.2cm, inner size when made up: 22cm x 16cm x 2cm. Qualifies for Royal Mail Large Letter postage if under 750g
Package ships flat packed for easy storage, and are easy to assemble in seconds – no tapes, glue or staplers are needed
100% SATISFACTION: Please contact us via e-mail for any case, we guarantee our customers 100% money back in 90 days.

AKAR White A6/C6 Large Letter Postal Box - 112x163x20 mm - Letterbox Pip Royal Mail Small Boxes for Posting [Pack of 50]

Why We Love It

Saves on postage costs.
Quick to assemble.
Lightweight and space-saving.

Main Highlights

LARGE LETTER PIP POSTAL BOXES : Cardboard large letter postal boxes designed for shipping. Suitable for sending fragile items when used with proper packaging. Made from durable single-wall corrugated cardboard. Manufactured in the UK and 100% recyclable. Dimensions: 112x163x20mm.
HIGH QUALITY LARGE LETTER BOXES : The C6 size shipping box is made of recyclable corrugated cardboard, which is lightweight but sturdy, ensuring your stuff safety. you can use the boxes as gift boxes, just need some ribbons to make the decorated package more unique. The box has a locking tab at the front allowing it to secure the box. These are commonly used for small products or gifts , stationery, retail and e-commerce, and cards.
ALL PURPOSE CARDBOARD SHIPPING MAILING POSTAL PIP BOXES : Cardboard boxes cartons C6 large letter pip boxes are an easy way for Mailing , Postage , PIP , Large Letter , Parcel , Shipping , Posting , Delivery , Mail for home , office , workplace , business and commercial with our all-purpose flatpack cardboard postal box.
PROTECTIVE PACKING MATERIAL QUICK ASSEMBLE : Keep your items safe with our strong heavy duty flat pack cardboard postage boxes also known as large letter parcel postal boxes . Stackable , Easy to fold , Easy to assemble, Easy to carry and effective. No tape, glue, staples needed, can be folded in seconds.
HEAVY-DUTY POSTAL BOXES FOR SHIPPING : All our White cardboard postal boxes C6 are supplied flat packed for transit and delivery and can be used without tape. Suitable for gift packaging, e-commerce shipping, or storage purposes. Our shipping boxes offer amazing strength and durability. They provide more protection than standard mailers, ensuring the contents stay secure during transit.

Corrugated Cardboard Shipping Boxes, 15x15x2cm Royal Mail Large Letter PIP Postal Boxes, Packaging Mailing Boxes for Business, Posting, Storing or Gift(Pack of 10)

Free Shipping

Why We Love It

Perfect for small items.
Eco-friendly and recyclable material.
Easy to assemble and store.

Main Highlights

Pack, Ship, Mail, or Store small items in these cartons, they make the perfect box for those little products or gifts that need to be sent out or stored until ready to use
Made from strong 32ECT-E single wall corrugated kraft cardboard which is Eco-friendly, recyclable and sturdy for daily use
Outer size: 15cmx15cmx2cm, inner size when made up: 14cmx14.7cmx1.8cm. Qualifies for Royal Mail Large Letter postage if under 750g
Package ships flat packed for easy storage, and are easy to assemble in seconds – no tapes, glue or staplers are needed
100% SATISFACTION: Please contact us via e-mail for any case, we guarantee our customers 100% money back in 90 days.

MEG4TEC BLACK MINI A6 A5 A4 LARGE LETTER SHIPPING SATIN PACKAGING BOXES (C5 (22cm x 16cm x 2cm), 20)

Free Shipping

Why We Love It

Flexible Quantity Selection feature.
Easy, hassle-free assembly process.
Maximize budget with PIP.

Main Highlights

SATIN BLACK LARGE LETTER SHIPPING PACKAGING BOXES
Flexible Quantity Selection: Customize your order according to your needs with our multi-listing feature, allowing you to select the precise quantity of each item.
Easy Assembly: Our boxes are designed for hassle-free assembly, saving you time and effort when preparing your shipments.
Cost-Efficient Postage: Maximize your mailing budget with our Large Letter Pricing In Proportion (PIP) Black Boxes. Designed to meet postal size guidelines, they qualify for lower postage rates, saving you money.
Ideal For storing, shipping, packing, gifts

iDEALS UK PACKAGING LTD

iDEALS UK PACKAGING LTD 50 x C5 A5 Postal Pip Boxes Large Letter Boxes Generic Shipping Boxes Cardboard Boxes For Posting Large Letter Postage Boxes (Black)

Why We Love It

Strong and durable design. Easy to assemble. Environmentally friendly materials.

Main Highlights

These Letterbox Boxes Are Made With White Strong 150 K/T E-Flute Cardboard, Perfect Small Boxes For Posting Or To Be Used As Cardboard Gift Box, C5 Mailing Boxes C5 Box Mailers For Generic Products
Internal Size* : 229 x 159 x 20mm (23x16x2cm), External Size* : 245 x 165 x 24mm (24.5x16.5x2.4cm), Weight* : 45 Grams Approximately, Light Weight White Large Letter Cardboard Box
Manufactured From 70% Recycled Materials And 100% Recyclable And Compostable. You Can Reduce Your Environmental Impact Significantly By Using These Boxes For Posting Your Items And Gifts
Manufactured To Standard Fefco 0427 Design, Easy Assembling With Scored Fold Lines And Inset Folds, These Boxes Are Quick And Easy To Assemble And Do Not Require Staples Or Glue. Delivered Flat Packed
Best Value Packaging Boxes For Small Business, Cardboard Shipping Boxes, Postal Boxes, A5 Postal Boxes, Letter Box Boxes For Posting, Wax Melt Packaging Boxes, Flat Boxes For Gifts, Boxes For Shipping

8.7

Excellent

We scanned 296 products

We reviewed these offers relevant to the Small Postage Boxes Large Letter within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like AKAR, SR Mailing, Protecker, MEG4TEC, STRBOXONG, iDEALS UK PACKAGING LTD, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Small Postage Boxes Large Letter in the market, we considered we took a deep dive into 1481 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is A4/C4 || 320x230x20mm || Large Letter Postal Boxes - A4 & C4 Sizes - Pack of 50. We love many things about this product by AKAR. What sets it apart from the competition is Eco-friendly and cost-saving, Quick to assemble, More protection for items.
The best value product for most shoppers and where user satisfaction is continuously the highest is 50X C4 A4 Size Box Large Letter Strong Cardboard Shipping Mailing Postal Pip, LGELETBOXC4005 by SR Mailing based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Small Postage Boxes Large Letter and the best cost-to-value ratio is iDEALS UK PACKAGING LTD 50 x C5 A5 Postal Pip Boxes Large Letter Boxes Generic Shipping Boxes Cardboard Boxes For Posting Large Letter Postage Boxes (Black)at iDEALS UK PACKAGING LTD with a % discount.
Our list of the best Small Postage Boxes Large Letter is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Small Postage Boxes Large Letter in The UK

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AKAR C6 A6 Size 112 x 163 x 20 mm Large Letter PIP Boxes for Royal Mail - Pack of 50

Triplast C6 160 x 110 x 20 mm White PIP Cardboard Large Letter Postal Box for Royal Mail (Pack of 25)

Wellpack Europe Corrugated Cardboard Large Letter Small Parcel Boxes Postage Shipping Postal Box (C5 (A5 / 222x160x20mm / 22x16x2cm), White, Pack of 10)

Triplast C5 222 x 160 x 20 mm White PIP Cardboard Large Letter Postal Box for Royal Mail (Pack of 5)

AKAR Brown Mini C7/A7 Large Letter Size Box, 101x101x20mm - Sturdy Corrugated Cardboard Postal for Shipping, Mailing, and Packing - Compact C7 PIP for Small Items (10)

redchocol8® 10 x Royal Mail "Large Letter" Size Cardboard Mini XS PIP Box Postal Mailing Wrap Approx. dimension: Internal dimensions 101mm x 101mm x 20mm - External dimensions 115mm x 105mm x 23mm

C5/A5 || 218x159x20mm || AKAR White A5 Box Large Letter Postal Boxes C5 Pip Box A5 Postal Box Large Letter Box A5 C5 Postal Boxes C5 Box A5 Box Posting Royal Mail Large Letter Pip Box [Pack Of 5]

TGL PACKAGING™ C5 / A5 (218x159x20mm) Royal Mail Brown Large Letter Cardboard Postal Mailing PiP Boxes (10)

SEVEN4-UK Red Royal Mail PiP Size Guide Ruler – Letter & Large Letter Postage Slot Checker for Royal Mail Pricing in Proportion – Lightweight Plastic Mail Measuring Tool for Business & Home Use

We scanned 296 products

We concluded that: