14mm marbles can be used as replacements for lost Chinese checkers game marbles, marble runs, and many other marble games. these marbles are inspected and sized to fit... guaranteed! each net comes filled with 30 premium glass marbles - 5 each of 6 different colors. Chinese checkers games require 60 marbles for a full set. this is a half set at 30 pieces. please see item #77805 if you need a full set.