Got a kid learning guitar? You might try this:
My husband gave a guitar lesson to our youngest son's best friend this evening. The boy was brand new to the instrument and his guitar did not have fret markers on the edge of the neck. A five minute session with my Cameo fixed that little difficulty for him in a way that would not permanently mark the guitar.
The numbers are Ahoroni font and I believe that one comes with the program. They are about 1/4" tall. I was surprised how well the Cameo cut numbers that small, but it was super quick and they came out great. It took just a couple minutes to apply and a quick hit with a warm blow drier and a credit card will get them off quickly and cleanly when the boy learns his chords.