The device i.e. ring sizer (100), has a main ring (102) and a series of calibrated rings (104a-104d), where each calibrated ring has an inner diameter different from those of the other calibrated rings, and carries an indication representing the diameter. Each calibrated ring has two arches respectively comprising two free ends cooperating to form a closing system. Another end of each arch is connected to another end of the other arch by a joint that is in the form of a hinge. The calibrated rings respectively have secondary rings (106a-106d) that are fit on the main ring.
展开▼