An engagement ring is traditionally worn on the fourth finger of the left hand, commonly known as the "ring finger." This tradition dates back to ancient Romans who believed that a vein ran directly from this finger to the heart, calling it the Vena Amoris or "vein of love." Although this anatomical belief has been disproven, the custom remains strong in many Western cultures. There are some variations based on cultural and regional practices. For example, in countries like Russia, Germany, Norway, and India, the engagement ring is often worn on the right hand instead. In some cultures, men also wear engagement rings, sometimes on the right hand during the engagement period before switching to the left hand after marriage. In summary, the most common and widely recognized tradition is to wear the engagement ring on the left hand ring finger, but it can differ depending on personal preference or cultural background.