1. Measure and cut a 32-inch-long piece of shelf liner. Fold it in half, and cut down the center to make two 16- x 24-inch rectangles. Stack the pieces on top of each other. (When gluing the stones, the adhesive will seep through the top piece of shelf liner.)
2. Using your computer, create a large letter for a template, and print it out. I used a 700-point type size to create the “B” shown here. Use utility scissors to trim out the letter, and center it on the piece of shelf liner. Trace the letter onto the liner using a permanent marker, and then remove the template.