footstick

noun3

1. •
   A measuring rod that is one foot long.

   • Every time, the bricklayers have to use their footstick to check whether the right height has been reached. — 2008
2. •
   A piece of wood serving as a simple bridge over water.

   • The wee man crossed the footstick to where Johnny was and took him back over to his side. — 2017
3. •
   (historical) A sloped or beveled piece of wood or metal placed against the foot of a page that is being typeset, and locked in place by quoins.

   • Neither the sidestick nor the footstick should project beyond the other, as it will prevent the quoins from passing, and in unlocking will give a great deal of trouble. — 1863