The Fingertip Design Solid Bronze Cupboard Knob is a classic 38mm diameter knob ideal for wardrobes, kitchen cabinets and built in study furniture. Cupboard Knob Dimensions The Solid Bronze Cupboard Knob has a 38mm knob diameter. It is supplied with appropriate fixing screws. Solid Bronze Knob Made from solid bronze the cottage knob is traditional in every way, bronze is a living material which will age and mature over time.  If polished the natural beauty of the bronze material will shine through, however it will in time age and antique itself, if not lacquered or waxed.