Home plate is 17 inches wide at the broad end, facing the pitchers mound.
The overall specifications of home plate dimensions define it as a 17″ X 17″ square with the rear-facing corners lopped off to form a vertex pointing to the back of the batter’s box.
As mentioned above, the front edge is 17 inches long, while the two “sides” are 12 inches each. The arms of the point are each 8 1/2 inches long.
When you combine the dimensions of home plate with its placement on the field and the other rulebook specifications for diamond distances, the peak of the plate — again, pointing to the back of the box — is 127 feet, 3 and 3/8 inches from second base.