How to Sign "Twenty One"
To sign “Twenty One”, Using your dominant hand into “L” handshape front of you and bending your thumb out a couple of times. Also, you could using a sightly sideway “L” handshape with bending your thumb few times.
Examples Using "Twenty One" in a Sentence
1
I am twenty-one years old.
Sign 'AGE' starting from your chin, then transition your dominant hand into the 'L' handshape, bending your thumb a couple of times to indicate 'twenty-one'.
2
There are twenty-one students in the class.
Sign 'CLASS', then 'STUDENT', and finish by holding up your 'L' handshape slightly sideways, bending your thumb a few times to show the quantity.
3
My birthday is on the twenty-first.
After signing 'BIRTHDAY', hold your dominant hand in front of you in the 'L' handshape and wiggle your thumb down twice to represent the date.
How to Sign "Twenty One"
To sign “Twenty One”, Using your dominant hand into “L” handshape front of you and bending your thumb out a couple of times. Also, you could using a sightly sideway “L” handshape with bending your thumb few times.
Visual Logic(Etymology)
The sign for 'twenty-one' is a blended, lexicalized number. Instead of signing 'two' followed by 'one', ASL uses the 'L' handshape as the base for the twenties, and the wiggling thumb represents the 'one' in a single, fluid motion.
Signing Tips
Keep your index finger steady and pointing straight up or slightly sideways while you sign this. The movement should be isolated entirely to your thumb joint. Keep your hand relaxed so the thumb bends smoothly and naturally.
Common Mistakes
A common mistake is bending the index finger instead of the thumb, which can look like the sign for 'eleven'. Another mistake is bouncing the entire hand up and down rather than just moving the thumb.
Regional Variations
This sign is widely used and understood across the ASL community with minimal regional variation.
Examples Using "Twenty One" in a Sentence
1I am twenty-one years old.
Sign 'AGE' starting from your chin, then transition your dominant hand into the 'L' handshape, bending your thumb a couple of times to indicate 'twenty-one'.
2There are twenty-one students in the class.
Sign 'CLASS', then 'STUDENT', and finish by holding up your 'L' handshape slightly sideways, bending your thumb a few times to show the quantity.
3My birthday is on the twenty-first.
After signing 'BIRTHDAY', hold your dominant hand in front of you in the 'L' handshape and wiggle your thumb down twice to represent the date.
Frequently Asked Questions
Why don't I just sign 'two' and then 'one'?
In ASL, the numbers 21 through 29 (except 22) use an 'L' handshape as a base. Over time, 'twenty-one' evolved into a unique, single-motion sign where the thumb bends, making it much faster to sign than two separate numbers.
Should my palm face me or away from me?
Your palm should face forward (away from you) or slightly sideways. Your index finger points up or slightly forward while your thumb does the bending.
How many times should I bend my thumb?
Usually, bending your thumb twice is perfect. It does not need to be a long, continuous wiggle—just a quick, deliberate double bend is enough to clearly communicate the number.
ASL is a beautiful, expressive language. Practice regularly and have fun!