MagnatomicsNo. 337 Ten trapezoids and ten rhomboids in each unit, 12 units per display. Package size - 6.5"H x 7.75"W (15.2cm x 19.4cm) Display size -10.5"H x 15.75"W x 4.5"D (26.2cm x 39.4cm x 25.2cm)Minimum unit - 1