| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring device of a ring size capable of measuring simply and accurately the optimum size of a ring desired to be worm. SOLUTION: This measuring tool comprises plural groups having different inner diameters by forming one group, with seven kinds of ring bodies having the same inner diameter and width sizes of 1 mm-5 mm, 10 mm and 20 mm respectively, and a coupling or joining means capable of combining, connecting and releasing easily each ring body of 1 mm-5 mm, 10 mm and 20 mm is provided.
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