The baseball strike zone, explained

The official definition

Under the official rules of baseball, the strike zone is the area over home plate between the midpoint of the batter's shoulders and the top of the uniform pants (when the batter is in a natural batting stance) and the hollow beneath the kneecap. A pitch is a strike if any part of the ball passes through that zone.

• Width: home plate is 17 inches wide, and the zone is as wide as the plate. Because any part of the ball counts, a pitch that just clips the edge is a strike.
• Height: the zone moves with the batter. A taller batter has a taller zone. It is not a fixed box.

What counts as a strike

• A pitch in the zone that the batter doesn't swing at (a called strike).
• A pitch the batter swings at and misses, anywhere.
• A foul ball, unless the batter already has two strikes (a foul bunt with two strikes is a strikeout).

The count

The count is balls first, then strikes. A 3-2 count (a full count) means three balls and two strikes. Four balls is a walk, three strikes is a strikeout. A count is part of the box score in many apps and in a scorebook, see how to keep score.

Why youth strike zones vary

• Umpires are often volunteers or teenagers doing their best, and zones differ from umpire to umpire.
• Younger divisions sometimes use a wider zone to keep the game moving, or have modified rules entirely.
• Consistency matters more than precision. Teach kids to watch the umpire's zone for the first few pitches and adjust.

Tips for players and parents

• Encourage batters to swing at good pitches and take pitches clearly outside the zone. Chasing balls leads to strikeouts.
• Teach pitchers to throw strikes, but not to stress over every call.
• Never argue calls from the stands. Umpires' calls are final, and respect makes the game better for the kids.

Next: baseball rules for beginners.