You'll never have to worry about breaking these chess pieces! These pieces are made from solid silicone and are heavy, durable, washable, and flexible while at the same time they stand rigidly. This is a tournament size set with a 3.5" tall king and we include 2 spare queens for pawn promotion. Because the pieces are soft silicone no pads are added and this makes the pieces washable when they get dirty over time. This is the perfect set of pieces for schools or any situation where they might get some rough treatment over time because they won't break, crack, or chip even if stepped on.