Papyros Kiln Shelf Paper is a ceramic-based paper specially formulated for glass fusing. When placed between the kiln shelf and the underside of a glass project, Papyros prevents the glass from sticking to the shelf during firing. Because of its sturdy composition, Papyros provides excellent glass/kiln shelf separation on the first use, and frequently even in subsequent firings. Papyros is available in sheets and rolls. Sheets are 20.5" x 20.5"and can be easily cut with ordinary scissors to fit your kiln shelf. The hobby roll is 20.5" wide x 96" long and cut be easily cut with ordinary scissors to fit your kiln shelf.