I purchased these markers to make yard sale signs after a long fruitless search for the giant black poster markers. I bought a whole pack knowing that I would certainly need more than just one or two to finish the job. It took 10 -.- The tip is too thin for filling in big letters on a sign or poster but too wide for regular handwriting on smaller signs. They also ran out of ink very quickly. Even when just using them to write normally. I realize I was using them for a heavy job that they were not designed for but I probably won't buy this brand again.