The wedding ring is traditionally worn on the ring finger of the left hand in many countries such as the UK, USA, Italy, Spain, and Switzerland. This tradition is partly based on the ancient belief of the "vena amoris" or vein of love, thought to lead directly from the left ring finger to the heart. However, in several countries including Germany, Austria, Poland, Norway, and some Eastern European countries, the wedding ring is traditionally worn on the ring finger of the right hand. This varies due to cultural and religious customs. In summary:

• Most Western cultures and many others wear the wedding ring on the left hand ring finger.
• Some European and other countries wear the wedding ring on the right hand ring finger.

The choice of hand for the wedding ring depends on cultural traditions and personal preferences. The key is the ring finger on either hand, symbolizing love and commitment. So, the wedding ring can be worn on either hand, but classically:

• Left hand in countries like the US, UK, Italy, Spain
• Right hand in countries like Germany, Austria, Poland, Norway