With a non stick oven liner, spillovers clean up fast and easy! Even burned or baked-on messes wipe away with soapy water and sponge. For electric oven, place the oven liner under the heating element. For gas oven, place this over spill guard on the bottom rack. Reusable nonstick liners can be trimmed to fit smaller ovens. 26" long x 18" wide.