The Heritage Brass 38mm Round Stepped Cupboard Knob Polished Brass features a perfectly smooth face with a stepped base. Knob Finish This knob has a polished brass finish and would be suitable for all types of fitted or free standing furniture in residential situations and is simple to fit and maintain. Cupboard Knob Dimensions The cupboard knob measures at 38mm, the base measures at 22mm and it has a 24mm projection. It is supplied with appropriate fixing screws.