16 feet (4.88 meters)
http://wiki.answers.com/Q/What_is_the_diameter_for...

Softball uses a 16 foot diameter circle for the
http://www.chacha.com/question/whatisthediamete...

1. Draw three random dots on your circle. Connect the three dots to form a triangle. Using the ruler, find the midpoint of each side of the triangle. Using the protractor, draw lines
http://www.ehow.com/how_5743525_determinediameter...

1 If you have the radius of the circle : Add the radius again, or multiply the radius by 2. Or, r2 = D 2 If you have the circumference : The circumference is divided by Pi (3.14),
http://www.wikihow.com/CalculatetheDiameterofa...
