These highly visible, treaded, non skid lines from Gamma can be used to create a 36' or 60' court for 10 & under tennis. 8 Straights. (4 Blue, 4 Yellow) 12¾" x 3" each 4 Corners. (2 Blue, 2 Yellow) 10¾" x 10¾" x 3" each Nonskid surface on bottom keeps your lines and corners in place. Screen printed Gamma logo on each.