Based on my research, this appears to be fabric featuring characters from the Hanna-Barbera Productions animated series, "Punkin' Puss & Mushmouse." It's not as thin as a sheet, but rather around the thickness of a lightweight oxford cloth. The dimensions are approximately 102cm wide and 75.5cm long. The top and bottom edges are sewn. Although it didn't show up in the photos, upon closer inspection, there is some discoloration or staining along the center fold (see image 9). Additionally, there are some areas where the fabric is puckered or snagged, and some areas where the thread is thicker (see images 7 and 8). As it is a very old item, there may be other overlooked stains or imperfections. Please consider it for crafting small items, using parts, patchwork, etc.