The practice of people crossing their fingers may have evolved from the sign of the cross, which was believed to ward off evil.
See also:
- Do Any Animals Besides Black Cats Supposedly Bring Bad Luck?
- How Did the Rabbit’s Foot Come to Be Considered a Good Luck Charm?
- What Is the Most Number of Fingers and Toes Ever Possessed by One Person?
- What Did the Swastika Stand for Before Hitler Used It?
- Why Do Boys Wear Blue and Why Do Girls Wear Pink?

One Comment
I always thought, when thinking of the phrase “cross your fingers”, of when my mom would have us put our hands together to pray, interlocking our thumbs. She always called that crossing our fingers. So I associated crossing fingers with prayer. Strange how memories like that can stick with you.