Gelatin produced in "leaf" or sheet form. Sheet gelatin produces a clearer gelled product than its granular counterpart. Aside from culinary uses gelatin sheets can be used for crafts including gingerbread house windows and butterfly wings for cake decorating.
Gelatin sheets are sold in specialty baking shops. If you don't have a local source you can buy them online here at Amazon: PerfectaGel Platinum Gelatin Sheets (230 Bloom) - 20 Sheets