These chips are 39 mm diameter casino sized chips and are 11.5 grams in weight. They are produced from a composite resin and an insert that gives them the weight feel of a heavy casino quality chip. These are one of the heaviest casino chip on the market. The detail on these chips is great. The card suits around the chip as well as the detail spots on the edge of the chip add to the great appearance. NOTE: YOU WILL RECEIVE 10 DIFFERENT CHIPS (1 OF EACH COLOR) WITH YOUR ORDER.