Pitching mound dimensions are as follows: Diameter: 18 feet Height: 10.5 inches at the rubber, with a plateau at the top of the mound 5 feet wide. Distance to HB: 59 feet (60', 6" from back tip of home plate) The pitching rubber is 18 inches behind the center of the mound (10 feet in front of rubber and 8 feet behind rubber). Dimensions of the rubber are 24 inches by 6 inches.
Slope: Beginning 12 inches in front of rubber a line extended to HB will fall 1 inch for every 1 foot of distance until it is level with the plate.
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The pitching mounds used in the ballparks are built according to a specific size, namely it has to be 10 1/2" inches tall and 18' inches in diameter. The size of the mound can affect the quality of the game, so keep it in mind.
The mound is a circle with a diameter of 12 feet and the pitching rubber is 18 inches in length.