Unique Chinese Gifts / Chinese Cultural Products / Traditional Chinese Gifts: Chinese Abacus with Coins Chinese Abacus with Coins Size: 7.5" x 5" (19cm x 12.5cm) Elegant silk box holds one of China's many inventions: the Abacus. Still used today, especially in small stores - an abacus can easily match the speed of a calculator. Including 10 Chinese coins.