My mic cables came from the local music shop with colored heat shrink labels with the music store's contact information. I went with just two lengths; 15' & 30' which covers 90% of the needs on a lounge level stage. To identify them as mine, I wrote my initials on the colored heat shrink using a silver Sharpie. Since I'm always out with my gear, that works for positive identification, but may not be the best solution for a busy audio shop. The silver Sharpie is holding up okay on the cables, but really stands out on mic clips and stands.
