I bought a box of disposable gloves from a hardware store and cut the fingers out of them to use on my index finger. Works great. I have also used tape from an auto parts store to mark a grid line. It's original use is to mark off trim on a car to be painted. It does not leave a residue on the car paint or on my fabric. Probably a lot cheaper than marking tape at a quiilt shop. I know the disposable gloves are economical as one finger lasts a long time. Any disposable glove would work as long as the fingers are form fitting.