I hit my thumb with a hammer.
As a rule of thumb, you should plan on one pound of beef for every two guests.
Place your thumb on the scanner.
I've got two thumbs.
Right hand, thumb and forefinger.
After filling your pipe with tobacco, tamp it down with your thumb, but don't pack it too tightly.
The hand has five fingers: the thumb, the index finger, the middle finger, the ring finger, and the pinky.
The rule of thumb
most animals don't have thumbs
Bob held up his thumb to tell us everything was okay.
My thumb on my right hand hurts.
The baby sucks his thumb whenever he gets tired
He found it hard to write because he had broken his thumb.
Humans can pick things up and hold them because they have fingers and thumbs.
She had no rule of thumb about it, but she got it right every time.