Measuring your letterbox
All letterboxes we stock can be fitted to all door types; uPVC, Timber, Composite and Aluminium. Following this simple 3 step letterbox measuring guide, will leave you in no doubt about what letterbox you require. Deciding whether your letterbox is 10″ or 12″ is the simplest stage.
It may be more difficult to decide whether the letterbox is a panel or midrail. If after looking at this letterbox measuring guide, you are still unsure, feel free to contact our friendly support staff who will also be able to guide you through identifying and measuring your letterbox. We will also help you on identifying your door type i.e. uPVC, Composite, Timber or Aluminium.
Accurate measurements are the key to a clean, precise fit when upgrading your letterbox. A detailed guide from House Nameplate explains how standard letterbox sizes in the UK are often designed to accommodate A4-sized mail and why checking the width, height, and depth of the slot is so important. By referring to this guide before you buy, you’ll avoid common mistakes like choosing a unit that’s too shallow for your door or selecting an overly wide opening that affects weather resistance and security.
📚 Featured Collections in this Article
Letterboxes & Letterplates
Choose from letterplates and full letterboxes in various sizes, finishes & styles. Match the opening you measured so your post/mail fits without bending or damage.
