These guitar picks are an easy to make they are sturdy as well, so they are good as picks. They are small so you need to keep an eye on them, but they are good picks. They are 3 mm thick florescent blue acrylic and they are very sturdy, but like all guitar picks they grind away eventually, but not as fast as the standard guitar pick.go on Adobe Illustrator (I used CS5) take 12 arcs and connect 3 of them together for one, and then another 3, until you have four. Then cut a piece of 5x2 acrylic and set them on the 5x2, put them on the laser mill and cut, and you have your picks, but after they are printed they probably will need filing so file the sharp edges down.