{"id":10034,"date":"2023-09-06T06:19:00","date_gmt":"2023-09-06T06:19:00","guid":{"rendered":"https:\/\/www.shipbob.com\/uk\/?post_type=blog&p=10034"},"modified":"2025-09-23T13:34:27","modified_gmt":"2025-09-23T13:34:27","slug":"royal-mail-parcel-size","status":"publish","type":"blog","link":"https:\/\/www.shipbob.com\/uk\/blog\/royal-mail-parcel-size\/","title":{"rendered":"Understanding Royal Mail Parcel and Letter Sizes: Comprehensive Guide for Ecommerce"},"content":{"rendered":"\n

Royal Mail is a trusted UK-based courier company that offers a wide variety of parcel and letter sizes that suit different ecommerce business needs. <\/p>\n\n\n\n

Whether you are shipping from the UK internationally or locally, Royal Mail is available in support of UK-based ecommerce. <\/p>\n\n\n\n

This article provides an overview of the different options Royal Mail offers for parcel and letter sizes.<\/p>\n\n\n\n

Overview of Royal Mail parcel services<\/h2><\/div>
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With a rich history that spans over 500 years, Royal Mail is one of the oldest parcel services companies in the world. It currently offers parcel and letter services for items of different sizes.<\/p>\n\n\n\n

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You will see in the table below, a quick overview of the maximum dimensions of Royal Mail\u2019s courier services.<\/p>\n\n\n\n

Format<\/strong><\/td>Maximum weight<\/strong><\/td>Maximum length<\/strong><\/td>Maximum width<\/strong><\/td><\/tr>
Small Parcel<\/td>2 kg<\/td>45 cm<\/td>35 cm<\/td><\/tr>
Medium Parcel<\/td>20 kg<\/td>61 cm<\/td>46 cm<\/td><\/tr>
Large Parcels<\/td>30 kg<\/td>2.5 m<\/td>N\/A<\/td><\/tr>
Letter<\/td>100 g<\/td>24 cm<\/td>16.5 cm<\/td><\/tr>
Large Letter size<\/td>750 g<\/td>35.3 cm<\/td>25 cm<\/td><\/tr>
Tubes<\/td>Ensure that length + (2 x diameter) < 104 cm, and the greatest dimension is < 90 cm.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Royal Mail Small Parcels<\/h3>\n\n\n\n

These small parcel boxes came in many variants that can go up to 45 cm x 35 cm x 16 cm in size. And it allows for items with a maximum thickness of 1.6 cm and up to 2 kg in weight.<\/p>\n\n\n\n

Medium Parcels<\/h3>\n\n\n\n

Royal Mail medium parcels refers to packages that are as large as 61 cm x 46 cm x 46 cm, and up to 20 kg.<\/p>\n\n\n\n

Large Parcels<\/h3>\n\n\n\n

Royal Mail large parcels refer to packages that are up to 2.5 m in length or up to 30 kg would need to be shipped via Royal Mail large parcels. This is sent via ParcelForce Worldwide, a part of Royal Mail.<\/p>\n\n\n\n

Letter <\/h3>\n\n\n\n

If you have a letter of maximum size 24 cm x 16.5 cm x 0.5 cm (length x width x thickness) and up to 100 gm weight, you can use Royal Mail letters. Both, first and second class letter sizes are the same.<\/p>\n\n\n\n

Large Letter <\/h3>\n\n\n\n

With Royal Mail large letters, send large letters that are a maximum size of 35.3 cm x 25 cm x 2.5 cm (length x width x thickness) and not weighing more than 750 g.<\/p>\n\n\n\n

Tubes<\/h3>\n\n\n\n

This is used for goods that weigh up to 2 kg, with length up to 90 cm and length plus twice the diameter not more than 104 cm.<\/p>\n\n\n\n

Here is an overview of the costs associated with each Royal Mail service:<\/p>\n\n\n\n

Royal Mail Size Types<\/strong><\/td>Weight up to:<\/strong><\/td>Price<\/strong><\/td><\/tr>
Small Parcel<\/td>2 kg<\/td>\u00a33.49<\/td><\/tr>
Medium<\/td>– 2 kg
– 10 kg
– 20 kg<\/td>		– \u00a35.49
– \u00a36.99
– \u00a310.49<\/td><\/tr>
Tube<\/td>– 100 gm to 2 kg
– 5 kg to 10 kg
– 15 kg to 20 kg<\/td>		– \u00a34.49
– \u00a35.99
– \u00a39.49<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/section>\n\n\n\n

Comprehensive guide to Royal Mail parcel sizes<\/h2><\/div>
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Below are a few examples of parcel sizes and prices when shipped via Royal Mail (not all of which can be fulfiled by ShipBob, but are used for illustration purposes):<\/p>\n\n\n\n

Item<\/strong><\/td>Dimensions<\/strong><\/td>Weight<\/strong><\/td>Royal Mail service<\/strong><\/td>Royal Mail pricing starting from (for shipping within the UK)<\/strong><\/td><\/tr>
A book<\/td>22.9 cm x 15.2 cm <\/td>142 gm<\/td>Small parcel<\/td>\u00a32.99<\/td><\/tr>
A canvas<\/td>50 cm x 50 cm<\/td>1 kg<\/td>Tube<\/td>\u00a34.49<\/td><\/tr>
A violin for kids<\/td>33 cm  <\/td>500 gm<\/td>Medium parcel<\/td>\u00a34.49<\/td><\/tr>
A chair<\/td>175 cm x 80 cm<\/td>30 kg<\/td>Large parcel<\/td>\u00a354.33<\/td><\/tr>
A laptop<\/td>38 cm x 26 cm<\/td>4 kg<\/td>Medium parcel<\/td>\u00a35.99<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

A few notes:<\/strong><\/p>\n\n\n\n