Counting in Sign Language: How to Sign 7 and 21

The short answer

In American Sign Language (ASL), 7 is signed on one hand by touching the tip of the thumb to the tip of the ring finger while the index, middle and little fingers stay extended. The number 21 is commonly signed with the thumb and index finger extended, similar to an L shape, while the thumb bends or flicks a couple of times. These descriptions apply to ASL as generally taught in the US. Other sign languages count differently, and regional and personal variation exists even within ASL.

No specific source evidence was supplied for this guide. The descriptions below reflect widely taught ASL conventions rather than a cited reference, so a qualified ASL instructor or a reputable ASL dictionary is the best way to confirm details such as movement and orientation.

How to sign 7 in ASL

• Raise your dominant hand with the fingers spread.
• Touch the tip of your thumb to the tip of your ring finger.
• Keep the index, middle and little fingers extended.
• Face the palm outward, toward the person you are signing to, which is the orientation usually taught for 6 through 9.

The number 7 belongs to a pattern that makes 6 through 9 easy to remember. Each number is formed by touching the thumb to a different finger: the little finger for 6, the ring finger for 7, the middle finger for 8 and the index finger for 9. Because 7 and 8 differ only by which finger meets the thumb, clear finger separation matters, especially when the viewer sees the hand at a distance or on a screen.

How to sign 21 in ASL

• Extend your thumb and index finger, keeping the other fingers folded, so the hand resembles an L.
• Bend or flick the thumb a couple of times while the index finger stays still.

Several numbers in the twenties use this kind of distinct form with a small repeated movement instead of signing the two digits in sequence. Many signers also sign 21 as 2 followed by 1, and both forms may be understood depending on the community. If the person you are communicating with uses a different form, following their usage is the practical choice.

Counting conventions worth knowing

Palm orientation often carries meaning in ASL numbers. A common teaching convention is that 1 through 5 are signed with the palm facing the signer when counting or stating a quantity, while 6 through 9 face outward. Conventions for ages, times, money and ordinal numbers can change the movement or orientation, so a number signed in isolation may look different from the same number used in a sentence.

Sign languages are not universal. British Sign Language, for example, typically uses two hands for numbers 6 through 9, so its 7 looks quite different from the one-handed ASL form. If you are learning numbers for a particular community, check which sign language that community uses.

What this means on a webcam call

A webcam microphone does not capture signing at all. Signed numbers are carried entirely by the video, so features that affect how clearly the hand appears, such as framing, lighting, background contrast and smooth motion, matter more than audio quality. Numbers like 7 and 8, which differ by a single finger, and 21, which depends on a small thumb movement, are the kinds of details that can become hard to read if the image is dark, blurred or choppy.

Audio still matters in mixed conversations, for instance when a sign language interpreter voices for hearing participants, so the microphone should be checked for those participants. The supplied material contained no specifications, test results or compatibility data for any webcam or microphone, so this guide cannot recommend particular devices or settings.