MLB rule 1.07 defines the dimensions of the pitcher's plate as 24 inches by 6 inches. There is no dimension given for its thickness, or depth.
In MLB, the pitching rubber is 24 inches long and 6 inches wide.
pitching rubber
The distance from second base to the pitching rubber is the same as the distance from the plate to the rubber. It is 60 feet 6 inches.
18" & 24" Pitching Rubbers & Sets.
the place where the pitcher stands.
from the front of the pitching rubber to the back of home plate is 60'6"
43 feet
In the center of the mound at the highest point
24 inches by 6 inches
60 ft
MLB Rules state the pitching rubber will be at a height of 10 inches.
From high school on, it is 60' 6".