It seems you're in
Choose other country


Design your bespoke Royal Mail Packaging

Use Packhelp to design and order your custom Royal Mail Packaging and maximise the dimensions set by Royal Mail.

  • Simply pick your type of box that meets either Large Letter or Small Parcel dimensions
  • Customise it in our online editor
  • Place your order for as little as 30 pieces
 data-srcset  data-srcset

Royal Mail Large Letter packaging

Max size L 35.3 x W 25 x T 2.5 cm

Max weight 700 g

Size description Royal Mail Large Letter is the ideal dimensions for sending a book, flyers, marketing material, clothing accessories or a number of documents. Large letter dimensions allow you to send a package up to 2,5cm in thickness - this means that you can send a box or a large envelope.

Packhelp size F46 L 19.4 x W 24.5 x T 2.4cm

Packhelp size C4 32.4 x 22.9cm

Royal Mail Small Parcel packaging

Max size L 45 x W 35 x T 16 cm

Max weight 2 kg

Size description Royal Mail Small parcels are great for sending clothing, shoes and many other products. If you’re an ecommerce seller, there’s every chance that your product will fit into a Royal Mail Small Parcel.

Packhelp size F93 L 33.9 x W 44 x T 15.9cm

Royal Mail Pricing

Royal Mail Large Letter Prices
Format and max measurements
Max Weight
1st Class
2st Class
Large Letter
35.3cm long
25cm wide
2.5cm thick
Max Weight
1st Class
2st Class
Royal Mail Small Parcel Prices
Format and max measurements
Max Weight
1st Class
2st Class
Small Parcel
45cm long
35cm wide
16cm thick
Max Weight
1st Class
2st Class
1 kg
2 kg


Royal Mail’s Large Letter and Small Parcel sizes make it easier and cheaper for you to send your items all over the UK.

If you’re an online retailer, you can use customised Royal Mail Letter or Parcel packaging to increase your brand identity.

Explore all products
Choose other country