This set is ideal for teaching a range of mathematical concepts in early childhood including addition, subtraction, number bonds and ten framework. The bases can be placed side by side, under each other or stacked using the counters. All the pieces are made from FSC Certified Beech Wood. Set Contains 40 counters are chunky and ideal for little hands 33mm dia., 27 bases which include a 1 hole, 2-hole, 3-hole, 4-hole and 5-hole base size. 5-hole base measures 240mm long.