OKKO Pocket Chalker slips easily into your pocket and provides quick and easy access to your chalk during the game. Designed to hold any standard size (cube shaped) billiard chalk. Stick material: Plastic. Stick shape: Round. Stick diameter (in the middle): 11 mm. Stick diameter (at the edges): 7 mm. Stick length: 4 ¼” (10.8 cm). Chalk case material: Rubber. Net weight: 0.9 oz (24 gr). Chalk holder color: Black. 1 pc of Master Chalk (blue color) is included. The chalk is made in the USA by Tweeten Fibre Co.