The ring for proposing to a girl should be worn on the middle finger of the left hand.
1. According to international DRESS code, the engagement ring needs to be worn on the middle finger of the left hand. The left hand is considered the gathering place of all good luck, and the middle finger of the left hand symbolizes engagement and proposal status, so girls wear engagement rings on the middle finger of the left hand.
2. According to traditional Chinese customs, women should wear a proposal diamond ring on their left middle finger, because in the eyes of many people, a girl wearing a diamond ring on her left middle finger means that she already has a sense of belonging. Often, some women in love will wear a proposal diamond ring on their left middle finger to avoid the pursuit of other men. Moreover, even wearing an ordinary ring on the middle finger of the left hand is to show that one has already become a master.