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Large Letter Postal Boxes

The Royal Mail ‘Large Letter’ boxes are an excellent, economical way to send your items provided they fit within the 353mm x 250mm x 25mm size allocation, and are below 750g in weight. Our ‘Large Letter Postal Boxes’ are an excellent way to ensure your parcels stay within the required size guidelines. They arrive flat-packed for simple storage and take seconds to assemble. Their size will not only save on shipping, but will ensure the items arrive in a sturdy, professional way!

Showing all 10 results

DL PIP Royal Mail Large Letter Boxes

C4 PIP Royal Mail Large Letter Postal Boxes – Brown (320mm x 230mm x 20mm)

£3.95 Ex VAT £4.74 Inc VAT
L x W x H

320mm x 230mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
C4 PIP Royal Mail Large Letter Postal Boxes - White

C4 PIP Royal Mail Large Letter Postal Boxes – White (320mm x 230mm x 20mm)

£3.95 Ex VAT £4.74 Inc VAT
L x W x H

320mm x 230mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
DL PIP Royal Mail Large Letter Boxes

C5 PIP Royal Mail Large Letter Postal Boxes – Brown (218mm x 159mm x 20mm)

£4.45 Ex VAT £5.34 Inc VAT
L x W x H

218mm x 159mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
Royal Mail Large Letter Postal Boxes (PIP) - White

C5 PIP Royal Mail Large Letter Postal Boxes – White (218mm x 159mm x 20mm)

£4.45 Ex VAT £5.34 Inc VAT
L x W x H

218mm x 159mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
DL PIP Royal Mail Large Letter Boxes

C6 PIP Royal Mail Large Letter Postal Boxes – Brown (112mm x 163mm x 20mm)

£3.50 Ex VAT £4.20 Inc VAT
L x W x H

112mm x 163mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
Royal Mail Large Letter Boxes (PIP) - White Mini

C6 PIP Royal Mail Large Letter Postal Boxes – White (112mm x 163mm x 20mm)

£3.50 Ex VAT £4.20 Inc VAT
L x W x H

112mm x 163mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
DL PIP Royal Mail Large Letter Boxes

DL PIP Royal Mail Large Letter Postal Boxes – Brown (217mm x 108mm x 20mm)

£3.95 Ex VAT £4.74 Inc VAT
L x W x H

217mm x 108mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
Royal Mail Large Letter Boxes (PIP) - White Mini

DL PIP Royal Mail Large Letter Postal Boxes – White (217mm x 108mm x 20mm)

£4.20 Ex VAT £5.04 Inc VAT
L x W x H

217mm x 108mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
DL PIP Royal Mail Large Letter Boxes

MINI PIP Royal Mail Large Letter Postal Boxes – Brown (101mm x 101mm x 20mm)

£2.95 Ex VAT £3.54 Inc VAT
L x W x H

101mm x 101mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page
Royal Mail Large Letter Boxes (PIP) - White Mini

MINI PIP Royal Mail Large Letter Postal Boxes – White (101mm x 101mm x 20mm)

£3.45 Ex VAT £4.14 Inc VAT
L x W x H

101mm x 101mm x 20mm
Box Type

Royal Mail Large Letter Boxes
Select options This product has multiple variants. The options may be chosen on the product page

Send Postal Orders Efficiently with our Large Letter Postal Boxes

Our large letter postal boxes are the perfect item to help you send large letters through Royal Mail. Dispatch orders with confidence knowing that your parcels will be the perfect size to travel every time, streamlining any personal or business postage processes.

Eco-Friendly Solutions for Shipping Products

Tired of using plastic or polyurethane bags to dispatch your products? Our range of cardboard postal packaging is the ideal solution to ensure your parcel looks great and arrives safely. 

Like all our cardboard products, our large letter postal boxes are 100% recyclable and biodegradable, making them the perfect option for high-volume shipping. 

Save Time and Money With Our Large Letter Postal Boxes

Our large letter postal boxes are available to purchase in bulk and come with free UK shipping on orders over £50 (+VAT), saving you time and money on shipping costs.

Large Letter Postal Box FAQs

What are the Benefits of Using Large Letter Postal Boxes?

Our large letter postal boxes have been designed to provide the best solution for shipping products while staying within the limits set by Royal Mail. This gives them several advantages to other forms of packaging, including:

  • Uniformity of appearance
  • Maximum space for shipping products
  • Professional, high-quality materials
  • Confidence that your package is the appropriate size for Royal Mail postage

What Are the Dimensions of a Large Letter Postal Box?

Schott Packaging offers 5 different sizes of large letter postal boxes, each of which comply with the 353mm x 250mm x 25mm sizing guide set out by Royal Mail for large letters. Our sizes are:

  • MINI PIP: 101mm x 101mm x 20mm
  • DL PIP: 217mm x 108mm x 20mm
  • C6 PIP: 112mm x 163mm x 20mm
  • C5 PIP: 218mm x 159mm x 20mm
  • C4 PIP: 320mm x 230mm x 20mm

Each size is available in either Kraft or white card and, provided the package weighs less than 750 grams when sent, is guaranteed to comply with Royal Mail large letter guidelines.