Strike zone

I need to practice control more so I want to make a strike zone on a wall. What should I make the deminsions? I mean how wide is home plate, and how tall should I make the zone?

it should be seventeen inches wide (width of home plate). since the hight varies from batter to batter you should find an average size person in your league and measure from the bottom of his knees to about the top of his belly button (about 26 inches). so the srtikezone’s dimensions should be 17" by about 26". it should be about 18" off the ground.