VAT inc

Royal Mail Large Letter Postal Packaging

Large Letter PiP Postal Boxes
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Large Letter PiP Postal Boxes

These narrow, single-wall white large letter boxes are the perfect size to comply with the Royal Mail’s large letter size specifications. In order to stay within the guidelines set out by Royal Mail, these large letter posting boxes all have a height, or thickness, of no larger than 25mm. 

Be sure not to overfill this large letter box packaging, as they may not stay within these strict specifications when overfilled. Cardboard large letter postal boxes also have a maximum weight capacity of 750g, with the length and width of the item not being able to exceed 353mm and 250mm respectively. 

- White and brown large letter boxes are the perfect size for Royal Mail’s large letter specification
- Fits through a letter box without becoming damaged or creasing for convenience
- Made from a highly durable and sturdy cardboard material which is also significantly more eco-friendly than bubble mailers
- These letter postal boxes are 100% recyclable and biodegradable

It is essential that you remember not to overstuff large letter postage boxes as the cardboard will bend around the object - preventing the package from being classed as a large letter by the Royal Mail; meaning you’re likely to incur higher postal prices. 
In order to prevent incurring higher prices in the postal system, make sure that the box lid lays flat on the item within. 


£1.76 - £8.06
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Why Use Royal Mail Large Letter Boxes? 

There’s a wide range of additional benefits to using Royal Mail large letter boxes. Primarily, you can accurately calculate your postage costs when consistently using this style of packaging as you’ll establish regularity in terms of costs when compared to the differing widths and weights that come into play when using an alternative postage method. 

Next, these corrugated cardboard boxes also have the advantage of being significantly more durable and rigid compared to mailing bags - helping to provide a greater degree of damage resistance to its contents. If you’re packing items smaller than the Royal Mail large letter box, simply fill the void with cushioning in order to prevent the item from moving within the box and safeguard against potential damage. 

There are five available sizes, with their Internal dimensions being:

  • C7 (A7): Die-cut 101 x 101 x 20mm large letter
  • C6 (A6): Die-cut 160 x 110 x 20mm large letter
  • C5 (A5): Die-cut 222 x 160 x 20mm large letter
  • C4 (A4): Die-cut 322 x 229 x 20mm large letter
  • DL: Die-cut 216 x 110 x 20mm large letter
6 Price Per Unit    Pack 14
Code Ref Internal Dimensions mm (LxWxH) Board Grade Pack Quantity 1-4 Packs 5-9 Packs 10-14 Packs 15-39 Packs 40+ Packs Qty
9086_25 C7 101 x 101 x 20 Single Wall Brown 25 £0.130 £0.106 £0.095 £0.088 £0.071
9051_25 C6 160 x 110 x 20 Single Wall Brown 25 £0.139 £0.121 £0.112 £0.103 £0.092
9052_25 C5 222 x 160 x 20 Single Wall Brown 25 £0.182 £0.163 £0.156 £0.148 £0.126
9053_25 C4 322 x 229 x 20 Single Wall Brown 25 £0.215 £0.204 £0.202 £0.192 £0.178
9087_25 DL 216 x 110 x 20 Single Wall Brown 25 £0.159 £0.135 £0.130 £0.122 £0.098
9088_25 C7 101 x 101 x 20 Single Wall White 25 £0.130 £0.106 £0.094 £0.088 £0.075
9054_25 C6 160 x 110 x 20 Single Wall White 25 £0.146 £0.127 £0.118 £0.108 £0.102
9055_25 C5 222 x 160 x 20 Single Wall White 25 £0.177 £0.169 £0.163 £0.156 £0.135
9056_25 C4 322 x 229 x 20 Single Wall White 25 £0.226 £0.215 £0.212 £0.192 £0.186
9089_25 DL 216 x 110 x 20 Single Wall White 25 £0.153 £0.129 £0.125 £0.117 £0.098
9050_25 C5 lock in Tab 230 x 160 x 22 Single Wall Brown 25 £0.323 £0.313 £0.304 £0.288 £0.274
90501_25 C5 lock in Tab 230 x 160 x 22 Single Wall White 25 £0.323 £0.313 £0.304 £0.288 £0.274
12 variations
Select below
Ref
Internal Dimensions mm (LxWxH)
Board Grade
Pack Quantity
1-4 Packs
5-9 Packs
10-14 Packs
15-39 Packs
40+ Packs
Quantity
Large Letter PiP Postal Boxes - Pallet Quantities
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Large Letter PiP Postal Boxes - Pallet Quantities

As above but on our best value Pallet deals!

£514.96 - £926.60
6 Price Per Unit    Pallet 11
Code Ref Internal Dimensions mm (LxWxH) Board Grade Quantity of units per pallet 1-4 Pallets 5+ Pallets Qty
9086_9600 C7 101 x 101 x 20 Single Wall Brown 9600 £0.068 £0.067
9051_9600 C6 160 x 110 x 20 Single Wall Brown 9600 £0.088 £0.083
9052_7200 C5 222 x 160 x 20 Single Wall Brown 7200 £0.120 £0.114
9053_3200 C4 322 x 229 x 20 Single Wall Brown 3200 £0.170 £0.161
9087_9600 DL 216 x 110 x 20 Single Wall Brown 9600 £0.093 £0.088
9088_9600 C7 101 x 101 x 20 Single Wall White 9600 £0.072 £0.068
9054_9600 C6 160 x 110 x 20 Single Wall White 9600 £0.097 £0.092
9055_7200 C5 222 x 160 x 20 Single Wall White 7200 £0.129 £0.122
9056_3200 C4 322 x 229 x 20 Single Wall White 3200 £0.177 £0.168
9089_9600 DL 216 x 110 x 20 Single Wall White 9600 £0.093 £0.089
10 variations
Select below
Ref
Internal Dimensions mm (LxWxH)
Board Grade
Quantity of units per pallet
1-4 Pallets
5+ Pallets
Quantity
C6, C5 & C4
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C6, C5 & C4 "Deep" Small Parcel Box

Die-cut fold-up box with lock-in tabs based on the very popular C6, C5 and C4 PiP box.

This "Deep Version" is used for posting via the small parcel size with Royal Mail.

Directly from an FSC certified UK manufacturer.

Eco-friendly boxes from an eco-friendly supplier.

These boxes are made by us, in house from FSC certified material which contains at least 70% recycled content. We are a certified FSC Chain of Custody member (member number 'NC-COC-005535 QM'). We can provide evidence of this and certify the material used on your invoice.

Made from quality rigid E-Flute cardboard - perfect for posting via Royal Mail or other couriers.

Available in brown or white outer board.

£5.93 - £13.92
Code Ref Internal Dimensions mm (LxWxH) Board Grade Pack Quantity 1-4 Packs 5-9 Packs 10-14 Packs 15-39 Packs 40+ Packs Qty
9180_25 C6 Deep Small Parcel 160 x 110 x 50 Single Wall Brown 25 £9.72 £8.83 £8.25 £7.90 £7.64
9177_25 C5 Deep Small Parcel 222 x 160 x 50 Single Wall Brown 25 £9.72 £8.83 £8.25 £7.90 £7.64
9170_25 C4 Deep Small Parcel 322 x 229 x 50 Single Wall Brown 25 £13.92 £9.74 £8.75 £8.50 £8.31
9178_25 C6 Deep Small Parcel 160 x 110 x 50 Single Wall White 25 £8.33 £7.84 £7.25 £6.94 £5.93
9179_25 C5 Deep Small Parcel 222 x 160 x 50 Single Wall White 25 £9.72 £8.83 £8.25 £7.90 £7.64
9171_25 C4 Deep Small Parcel 322 x 229 x 50 Single Wall White 25 £13.92 £9.74 £8.75 £8.50 £8.31
6 variations
Select below
Ref
Internal Dimensions mm (LxWxH)
Board Grade
Pack Quantity
1-4 Packs
5-9 Packs
10-14 Packs
15-39 Packs
40+ Packs
Quantity
Code
Description
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