AL Abacus Standard is Made in the USA!* This 9-3/4" x 7-1/2" (24.75 cm x 19.25 cm) plastic abacus is grouped in 5s and 10s to encourage quantity recognition and visualization. On one side the child performs basic operations and learns strategies for mastering the facts. On the reverse side, trading is emphasized. The i Sonlight resource: https://www.sonlight.com/products/al-abacus-standard