This pack of caps can produce extremly thin lines*. These caps range from the smallest at 0.1" thru the widest at 0.7". These caps were specially selected from different manufactures by our team and made into a set of some of the smallest spray caps around. These are great for writing names, marking items, writing words, making tiny details on murals and paintings. *NOTE: To get the thinnest lines possible you will need to quarter and half press the caps. Practice makes perfect!