I do the 2x3 boxs with a 1 point line usually red, hand them 2 or 3 fine tip sharpies and tell them to be neat and stay in the box when I convert to vector I delete the boxes.. I basically do the same thing when they want to sign their names in a number, basket ball, letters or whatever I print an outline to size on white paper give them 2, and some sharpies scan it, convert it, use the outline to line up, print my vellum, and then I'm off and printing...2 because sometimes they mess it up.. gave out vellum before, no matter how many times you say be careful, it never fails, little Jimmy never washes his hands after lunch...