The Wooden Hundred Squares provide a very visual, tactile representation of the concept of multiples, particularly when used together with the Wooden Thousand Cubes.  The set includes forty-five wooden silk-screened hundred squares, each measuring 8.5 cm x 8.5 cm x 0.8 cm (about 3 5/16" x 3 5/16" x 5/16").  The full set can be stored and carried in the Hundred Squares Tray, sold separately.