3-piece set includes a rectangular sushi mold frame, top and bottom pressing boards. Made of polypropylene with a non-stick surface for easy rice removal. Designed for forming oshizushi, traditional pressed box sushi. Sushi roll areameasures 8.5" long x 1.75 wide x 1.75 tall. Filling 1 mold yields 10 pieces of pressed sushi. Knife guides make cutting sushi a breeze. Also includes two rubber bands - holding the set together for a few minutes can make your sushi firmer and easier to cut and eat!