NCAA 1-7 First, Second and Third Bases
First, Second and Third Bases
SECTION 7. First, second and third bases shall be white canvas bags, or suitable rubberized material, securely fastened to the ground. Each bag shall be 15 inches square, filled with soft material to a thickness of 3 to 5 inches.
a. A release-type base may be used for NCAA competition.
b. The double first base may be used only during regular-season competition.