Bund straps are a way to give your watch a unique bold look. Originally crafted for pilots, the bund strap features an extra piece of leather within that protects the wearer's wrist from extreme temperatures that could make the metal of the watch too hot or cold against the skin We will email you after your purchase to confirm the details of the bund pad. Key Bund Pad Dimensions: Center Width: (Diameter of the watch including the crown) Narrow Width: (Lug width + 5mm) Length: (110mm by Default) Mixing and matching different colours for the strap and the bund pad is available. Please email us for a custom invoice.