Does wearing a ring on a finger other than the little finger (pinky) break an oath sworn not to wear a ring?

Primary text

Wearing a ring on any finger other than the little finger breaks the oath. The justification is that the person is wearing what they swore to refrain from wearing; this is analogous to wearing trousers as a lower garment (I'tizar with trousers), unlike placing a cap on the foot, which is considered frivolous behavior. There is no difference between the little finger and others except by customary designation.