POUND / WEIGH / TON:
Both hands form "H" shapes. The right "H" rocks back and forth on top of the left "H" in a quick double movement.
The left hand doesn't move during this sign.
Here is a view of that sign from an angle:
POUND: (alternate method)
When you are specifically talking about "pounds" you can use either the "pound/weigh/ton" sign above, or you can spell the letters "L" and "B." When you use the fingerspelled version you do not add an "S" to indicate the plural "pounds." Instead you pluralize this concept by stating the number of pounds, for example: 15 LB.
American Sign Language University ™ ASL resources by Lifeprint.com © Dr. William Vicars