The Oncourt Offcourt Red Long Lines 12 Piece Set is a great way to quickly set up tennis court boundaries, define target zones, or to clearly guide players to correct court position. Designed to fit into any racquet bag, Long Lines are an ideal length for team coaches, traveling coaches, and players. One side has a slip-resistance grip pattern molded into the surface. They are each 24" long and 3" wide. Packaged in a set of 12. Color matches courts to create boundaries for 60-foot 10 and Under Tennis courts.