Apparatus for accurately measuring the distance between a golf ball and the hole on a putting green, i.e., for determining proximity, especially in golf competitions to see who can hit their ball onto the green to end up in closest proximity to the hole. An accessory to the measurement device is a proximity sign for recording the proximity measurements. The invention comprises apparatus and method for conveniently storing and using the measurement device(s). For proximity measurements, the device is configured to removably and repositionably attach a tape measure to a flag pin (generally the flag pin in the hole on the green in contest). The proximity sign is similarly configured. For storage of a device when not in use, the devices include spring clips and an optional security ring to impede unauthorized removal from the flag pin.