Believe he is referring to the small thick cardboard strips that help hold the ends of the headliner in place, directly below the sides of the package tray. There are tabs that are bent down to hold the cardboard strips in place. I don't have one in front of me, but if I had to guess the dimensions, it would be about 1/2-3/4" wide, about 8" long and about 1/4" thick.