I try to used a piece of the same light color fabric I used in the quilt. Once for a wedding I made a border with a wedding print even tho I hadn't used it in the quilt. Sometimes I used a left over block and sometimes I just use a piece of muslin. I lightly mark lines on the fabric so the wording is straight. I always use tear away stabilizer because the lettering usually bunches up the fabric if I don't. I had an "M" mess up last time even with the stabilizer.