This is a cushion cover, pillow cover, towel, or cloth.
A very cute version of Yamamoto wields a very cute sword on one side of this long, narrow cushion, and appears in more normal fashion on the other! It's about 13.5cm by 42cm and plumply stuffed with fluff; it's a perfect support for your neck or lower back, or a comfortable chin-rest for your favorite housepet!