For the ultimate in fine writing and drawing, Just Write Gel Pens are just what you are looking for. This set of 12 colored gel pens feature a 0.4 mm super fine nib so you can get the detail you need. Just Write Gel Pens make great coloring tools to for those intricate details. And measuring at 4.75 inches long, Just Write might be just the right size gel pen for you to take on the go. Suitable for ages 6 and up.