Our Double Sided Trim features the beauty of fractal geometry in soft blues and purples. Fractal geometry was developed as a way to measure irregular shapes - like coastlines, mountains, blood vessels and more - fractal geometry helps us better understand the world in which we live. . . and computer generated fractals are just plain cool! These durable, bright borders are printed on thick, coated paper. Each package contains 12 strips -- a total of 35 feet! Use our Borders to brighten bulletin boards, frame doorways, define learning centers, and celebrate special events!