What is the difference between a letterbox and a letter plate?
Although the terms are often used interchangeably, there is a subtle difference between a letterbox and a letter plate. A letterbox typically refers to the full mail-opening mechanism that includes both the internal and external parts—a flap on the outside and often a draught-proof or tidy-facing plate on the inside. It’s a complete unit, usually built into the door itself. A letter plate, on the other hand, usually refers to the external flap only—the decorative and functional piece fitted to the outside of the door to cover the opening and protect against the elements. At Rinkit, we stock both styles, with options in classic brass, brushed chrome, and matte black, so you can match your hardware to your door's look and feel. Whether you need a full replacement or just want to upgrade your front-facing finish, understanding the difference helps you pick exactly what you need for the job.
How do I know what size letter box I need?
Getting the right size is mostly about measuring your door and matching the opening. Start by checking the dimensions of your current letterbox or the space where you plan to install one—width, height, and the thickness of the door all matter. Most standard letter plates are around 250mm to 300mm wide, which suits the majority of UK front doors. You’ll also want to consider the size of post it needs to accommodate. If you regularly receive larger envelopes, catalogues, or magazines, it’s worth choosing a wider or deeper model. Rinkit’s collection includes clear sizing details on every product page, so you can confidently pick the model that fits without second guessing. It’s also a good idea to double-check whether the letterbox includes both inner and outer plates, particularly if you’re installing it into a solid wooden door with no cavity.
Do letterboxes and knockers need to match?
They don’t have to, but it definitely helps create a more cohesive, polished look. Choosing matching or complementary finishes gives your front door a more intentional feel—especially when paired with coordinated handles or numbers. At Rinkit, you’ll find a range of door knockers and letterboxes in similar finishes, allowing you to create a neat, consistent style across all your door furniture. It’s those small details that can really lift a home’s kerb appeal, offering charm, character, and a touch of personality before you even open the door.