These 11.5 gram 6 Spot poker chips are made of a High Quality Clay Composite Resin with a metal insert for added weight. Each chip is made to specifications and is perfectly balanced to give the proper effect. Chips measure 1.54 inch (40mm) in diameter, the same as official casino poker chips. Blank chips to be used as is in your games, or make your own personalized or custom printed poker chips using a variety of methods such as direct UV printing, or you can hot stamp them with foil. White chip center area to allow for easy customization.