Devardi Glass Lampwork, Beadmaking Highest Quality, Ceramic Fiber Blanket. 1 x 12 x 12 inches - 2 blankets Devardi Glass Lampwork Professional Grade Ceramic Fiber Blanket. 2 blankets: 12 x 12 inches. Each 1 inch thick. (comes as 1 blanket 12 x 24, which can be cut) We only sell 8# density blankets for the best insulating, heat resistant quality. Very tough blanket. Made in USA. Please click the blue "Devardi Glass" above to see all our listings.