Looking to save on your packaging costs? Our large letter boxes or Pricing in Proportion (PiP) boxes are designed to help you take advantage of the Royal Mail’s large letter pricing structure as they are able to fit through the 25mm large letter postal slot. This means you can enjoy substantial cost savings when sending small parcel items compared to the standard small parcel rate for shipping.

Our large letter postal boxes are available in a range of popular and convenient sizes to help you send a wide range of items, anywhere in the UK. Choose from C4 for large A4 sized items or C5 PiP boxes for posting Blu-ray discs, games, books and more. We also stock mini Royal Mail PiP boxes for items such as jewellery, watches and other smaller items – just remember that in order to qualify to the large letter pricing that your parcel needs to be under 750 grams in weight.

Help to protect your products during transit with the help of our strong, versatile and affordable large letter postal boxes. Not only will they keep items safe during postage, but they will also help you reduce your overall postage costs allowing you to pass these savings on to your customers.

Whether you just need a couple of PiP boxes for the occasional delivery or need thousands for your ecommerce business, simply select the number of boxes you need to see pricing details. We offer bulk pricing discounts with boxes available from just 7p a box when you order 1000 boxes or more. Take a look at our full range of large letter postal boxes below and order online now for free UK delivery with no minimum spend requirement.

Whatever your packaging needs, at Youthstar Direct we can help you save money with our fantastic range of wholesale products at discount prices.

Royal Mail Large Letter C5 Size, 40g Brown PIP Mailing Box 229 x 159 x 20 mm

From £1.99 Sold Out

DEAR YOUTHSTAR DIRECT CUSTOMER,  We have now launched a bespoke cardboard box and packaging supplies website -  https://boxes2u.co.uk/ We will no longer be fulfilling orders for mailing boxes and packaging supplies on Youthstar Direct from December 2021. We would like to thank you all for your business...

Royal Mail Large Letter C6 / A6 Size, 23g Postal Mailing Box 163 x 112 x 20 mm

From £1.99 Sold Out

DEAR YOUTHSTAR DIRECT CUSTOMER,  We have now launched a bespoke cardboard box and packaging supplies website -  https://boxes2u.co.uk/ We will no longer be fulfilling orders for mailing boxes and packaging supplies on Youthstar Direct from December 2021. We would like to thank you all for your business...

Royal Mail Large Letter C4 Size, 69g Brown PIP Mailing Box 327 x 230 x 20 mm

From £2.99 Sold Out

DEAR YOUTHSTAR DIRECT CUSTOMER,  We have now launched a bespoke cardboard box and packaging supplies website -  https://boxes2u.co.uk/ We will no longer be fulfilling orders for mailing boxes and packaging supplies on Youthstar Direct from December 2021. We would like to thank you all for your...

Royal Mail Large Letter Mini 15g Postal Mailing Box - 101 x 101 x 20 mm

From £1.99 Sold Out

DEAR YOUTHSTAR DIRECT CUSTOMER,  We have now launched a bespoke cardboard box and packaging supplies website -  https://boxes2u.co.uk/ We will no longer be fulfilling orders for mailing boxes and packaging supplies on Youthstar Direct from December 2021. We would like to thank you all for your business...

Royal Mail Large Letter DL Size Postal Mailing Brown Box - 217 x 108 x 20 mm

From £1.99 Sold Out

DEAR YOUTHSTAR DIRECT CUSTOMER,  We have now launched a bespoke cardboard box and packaging supplies website -  https://boxes2u.co.uk/ We will no longer be fulfilling orders for mailing boxes and packaging supplies on Youthstar Direct from December 2021. We would like to thank you all for your business...
FREE Standard UK Delivery
  • We offer FREE Delivery on all UK orders, regardless of the total order amount.

    We like to keep things simple, for you.