The Thin Prisms set includes 19 natural wood prisms measuring 20 cm long and 1 cm square on the ends.  Often used in conjunction with the Broad Stair to demonstrate volume and multiples, the Thin Prisms can also be used on their own for a variety of different exercises.  Comes in a natural wood storage box with a lid measuring 22 cm x 9 cm.

All Gonzagarredi products are approved by the Association Montessori Internationale (AMI).