This chess set includes a set of silicone chess pieces with a silicone chess board. The pieces are made from solid silicone and are heavy, durable, washable, and flexible while at the same time they stand rigidly. This is a 34 piece tournament size set with a 3.75" tall king and includes 2 extra queens for pawn promotion. Because silicone is so soft there are no felt pads on the bottom of the pieces so they can be easily washed. The silicone chess board is soft and pliable and you can roll it or fold it and it will lay back out perfectly flat no matter how long it's been stored away. The board has 2.25" squares and is 20" overall with alpha-numeric notation around the border to make it easier to record moves. The unbreakable nature of this chess set makes it an excellent choice for schools, clubs, and travel.