Stadium seating for Challenge Coins. Slant top coin display is the best way to display your coins for everyone to see. Holds up to 80 coins in 10 rows. Measures 15 x 7 5/8 x 2.5 inches. Usual size of coin is 1 3/4' in diameter. Some coins are 2" in diameter and some are 1 1/4" in diameter. The number of coins that the case will accommodate depend on the size of the coins used. Many cases may have varying coin sizes in the display.