How to Sign "15" in American Sign Language (ASL)
In ASL, the number 15 is signed by showing "1" with your index finger up and then quickly making "5" with all fingers spread. The movement needs to follow ASL's standard way of making teen numbers by putting together "1" and another number. Just change your hand smoothly from "1" to "5" in one quick motion. People use this sign all the time for things like telling time, talking about money, and counting stuff.