We use the lines to convert our tennis courts to pickle ball court size. It is better than marking up the tennis courts.

This is great for teaching or playing with kids. Easy to turn a regulation court into one right-sized for each kid's age.

In pre-season we run two courts in our gym. Tape was peeling up the varnish so we tired these marking lines. They worked! I did have to wash them about every other day to make sure they would continue to stick and not be stick on the floor. I would like an opportunity to buy even more straights so we could condense our lines.