This is how you sign Back in American Sign Language.

How to sign

To sign "Back" in American Sign Language (ASL), hold your dominant hand in a fist with your thumb extended. Use your thumb to point backward over your dominant shoulder, indicating your back.

To sign "Back" in American Sign Language (ASL), make a fist with your dominant hand, extending your thumb. Then, point your thumb backward over your dominant shoulder to signify "back."