All signals should be clear and loud.
You are not only letting the players on the field know what happened but everyone in the benches, spectators and most importantly the scorers.
Raise your right hand like you are shaking hands.
Extend your arm up, bending at the elbow until your upper arm is parallel to the ground.
Take your hand back towards your ear.
Bring your hand forward with a clenched fist as if you are banging on a door while at the same time yelling
"He's out" or "Strike"
(We use the term "He's out" or "Hike" for a strike because it allows us to use our diaphragm to make a louder call without getting a sore throat!)
Extend both arms out parallel to the ground in front of your body.
Extend both arms to be outstretched keeping them up and parallel to the ground.
At the same time yell "Safe"
(We sometimes use the term "Hafe" because it allows us to use our diaphragm to make a louder call without getting a sore throat!)
From a position on the foul line, to call a ball fair you simply point in the direction of fair territory.
No voice is required as, we umpires, generally only use our voice when play needs to stop or has already stopped.
From a position on the foul line.
Raise both arms up above your head and slightly wider than shoulder width apart with both hands open and facing forward
Call “foul”
Move your right arm up in front of you so that your open right hand almost touches your shoulder
Shoot your right index finger forward whilst pointing towards the batter (if umpiring from behind the mound) or towards the pitcher (if umpiring behind the catcher)
Call “Play!”
Raise both arms up above your head slightly wider than shoulder width with both hands open
Call “time” (Loudly if necessary)
Hold both hands up above head height, more than shoulder width apart
You will indicate the number of balls on your left and the number of strikes on your right hand whilst saying the count
For example, for a count of 2 balls, 1 strike, you will hold up your left hand with 2 fingers and your right hand with just one finger whilst saying “2 balls, 1 strike”.
When you are signalling three balls with your left hand, try to ensure that all 3 fingers are visible as to avoid confusion over the count.