Display includes: 10 large slate boards, 18 x 26 cm (JP-120112) 10 small slate boards, 14.5 x 19 cm (JP-120212) 36 white chalk sticks (JP-989022) 10 sponges (KY-51450) Please note: Slate and wood are natural products, so no two pieces will look exactly alike. Irregularities in the wood, such as knot patterns, or streaks in the slate are natural characteristics and are not grounds for complaints.