Size: 25 x 6.4 cm Scope of application: a good tool for children's early math education. Can be used as a classic calculator for the office, an educational tool for teachers, or as a gift for abacus collectors. Educational toys for young children. This abacus is a great educational toy to help young children improve their motor skills by moving individual beads back and forth, they can learn how to count and learn colors. Math learning tool for older children. Children can use this wooden abacus to learn addition, subtraction, multiplication and division. It helps solve math problems and increases their interest in math Educational games for families children: educational toys for babies can provide parents with an opportunity to play math games with their children, thus increasing parent-child interaction. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.