senior women softball home plate size

Question
what is the size of the home plate for senior women slowpitch softball

Answer
Paul,

I don't know of any age group or association that modifies the size of home plate.  T-ball players use the same size home plate and bases as Major League Baseball.  I found the following on Wiki.

Home plate is an irregular pentagon. The front is 17 inches wide, faces the pitcher, and defines the width of the strike zone. Then parallel sides 8.5 inches long connect to the foul lines. Finally 12 inch sides run down the foul lines, connecting where the foul lines meet.
It can be thought of as a 17 inch square with the parts that would be in foul territory removed.

Tom