According to tradition in some countries (derived from Roman belief), the wedding ring is worn on the left ring finger because the vein in the left ring finger, referred to as the vena amoris was believed to be directly connected to the heart, a symbol of love.
why shouldn't a ring be worn on a pinky finger? if you like it do it as long as its not a safety risk at work.
the Index Finger
There is no specific finger that a purity ring must be worn on. It is a personal choice. Most people choose to wear it on their ring finger on their left hand, similar to a wedding ring, but it can be worn on any finger.
Eternity rings, having evolved from wedding rings, are also worn on the "ring finger", which is normally the third finger of the left hand.
A pinky ring is worn on the pinky finger of either the right or left hand. The pinky finger is the smallest finger and located the farthest from the thumb.
Ring
you can but a wedding ring is really the only ring that's supposed to be worn on your left finger... on your right ring finger it is fine though
it is recommended to worn on the ring finger.
index finger
Yes, people of Western countries wear the engagement and wedding ring on the same finger.
The fourth finger, also known as the ring finger, is sometimes jokingly referred to as the "lady finger" in certain cultures. Its name comes from the fact that it is traditionally where a wedding ring is worn.
A family ring is traditionally worn on the ring finger of the right hand, though customs can vary by culture and personal preference. In some cultures, it may also be worn on the left hand or even on a different finger altogether. Ultimately, the choice of finger for a family ring is a personal decision.