OKKO Round Pocket Chalker slips easily into your pocket and provides quick and easy access to your chalk during the game. Designed specifically to hold round-shaped Taom chalk. Stick material: Plastic. Stick shape: Round. Stick diameter (in the middle): 10 mm. Stick diameter (at the edges): 6.5 mm. Stick length: 4” (10 cm). Chalk case material: Rubber. Net weight: 0.75 oz (22 gr). Chalk holder color: Black. Chalk is not included.