The Large Number Cards 1-9000 includes thirty-six wooden cards, including nine each for units (1 to 9), tens (10 to 90), hundreds (100 to 900) and thousands (1000 to 9000). The cards are 3 mm thick and measure 5 cm wide, from 5 cm to 20 cm long. The whole set comes in a 25 cm x 18 cm storage box with lid. Also available in paper.
All Gonzagarredi products are approved by the Association Montessori Internationale (AMI).