Teach size and color with these beautifully designed beechwood disks. This set includes 7 Rainbow Buttons in red, orange, yellow, green, blue, indigo and purple. The buttons graduate in size and have slightly flattened surfaces for sorting and stacking activities. Rainbow Buttons have a smooth, natural finish which enhances the grain in the beechwood. These buttons are a stunning open-ended resource to develop hand-eye coordination and enhance imaginative play. Size of smallest button: 2" diameter. Size of largest button: 5.5" diameter. Suitable for all ages.