Creative Expressions Self Adhesive Crystal Strips. This is a double strip of clear adhesive crystals ready to cut to length, peel off the backing strip and press into place. There are 2 x 1yard lengths of crystals, which are easy to use and will create beautiful sparkling borders, edges and accents for card making scrapbooking and home decor. Use as a double or single strip. The crystals are 4mm diameter.