Very attractive Letterman IV designer letterbox in orange Practical, simple, good - that's how you can describe the Letterman IV designer letterbox. It dispenses with anything special in its design and offers the essentials. The letterbox impresses with its excellent workmanship and high-quality materials. With its versatility and quality, it has become a worldwide success. The letter slot measures 32.5 cm x 3.5 cm, so that letters in C4 format can also be inserted without being folded.