How to Sign "Which" in American Sign Language (ASL)

In ASL, "which" is signed by holding up your non-dominant hand with fingers spread, while your dominant index finger points to and touches each finger on the non-dominant hand in sequence. This picks from many choices. The movement shows how we choose one thing from many different options laid out before us. You use it in short questions. The sign helps people see exactly what you mean when you're trying to pick something specific.