The five-finger prayer is a method to help people remember categories of people to pray for. It is a memory device used as an aid to prayer.
The little finger, or the pinkie, is the smallest finger, and it represents the individual who is praying. We need to pray for ourselves, but in humility we need to remember that we are the least important.
The ring finger this is usually the weakest of our fingers, and it reminds us to pray for the weak and the sick among us.
The middle finger is the tallest finger, and it reminds us to pray for our leaders.
The pointer finger, or the index finger, reminds us to pray for people who point the way—teachers and church leaders.
The thumb is the thickest and strongest digit, and when the hand is at rest, the thumb is the nearest to the rest of the body, reminding us to pray for family and friends—people who are closest to us.
The five-finger prayer has been popularized by Pope Francis. There is nothing specifically Roman Catholic about the five-finger prayer; it is simply one method to help people remember whom to pray for, similar to a prayer list. Since we always have our hands with us, the reminder of those in need of prayer is constant.