This is a really fun and easy prop to make, and it's infinitely customizable. The ends are made from various colors of fleece, the "fillings" (? I don't know the proper term for the stuff you put in a sushi roll) are sewn on with invisible thread, and the seaweed around the outside is green polyester, and the whole thing is stuffed with a bunch of polyfill.

The dimensions are roughly 14" diameter by 18" long, and it weighs about a pound and a half. For reference, here is an identical sized one with a fursuiter: https://pbs.twimg.com/media/BqLkLuj.....w51E.jpg:large

Were I do to another one, I would recommend making it much thinner. As a fursuit prop, it's pretty bulky, plus it's very slippery if you're covered in fur. It's a nice couch pillow though, although you could go thinner and make throw pillows.