I've always used the Pigma pens, .5 as well. I bought a pack of 5 colors. I sometimes write down the name of the quilt (pattern name) when I made it and sign it. Other times, I just write a note directly to the person who is getting it. Depends on who the quilt is for. I like to set it with heat, just in case, but I know they last because one grand-niece has shown me her quilt and the fact that the label still shows and how much she loves it.