Shitajiki for handwriting are generally made of plastic about 1 to 2 mm in thickness, making them flexible but still durable.
Shitajiki for calligraphy are typically made of dark (blue or black) felt, and are available in a variety of sizes.
Merchandised shitajiki are very common, featuring images of everything from tourist attractions and celebrities to anime and manga characters.
Most shitajiki designs only go through one print run, making them highly collectible and often difficult to acquire.
Collecting shitajiki is a hobby for many anime and manga enthusiasts.