SEI-Block Letter Polyvinyl Heat Transfers: White. Transfers can be applied to any surface that will withstand the heat of an iron (wood, fabric, paper, glass, clay, cork, etc.) They are easy to apply and will not crack, peel or fade. Since they are made of fabric fibers, and not plastisol as many others on the market, you never have to worry about washing, drying or ironing over designs. Transfers are great embellishments for scrapbook pages as well. Acid and lignin-free. This 10.25x13.625 inch package contains six 8.25x9.25 inch sheets of thirteen 8 inch digits. Ages 12 and up. Made in USA.