This set of two 22mm dice is perfect for teaching kids about size. Each die is 6-sided featuring large and small images. This is an ideal way to introduce size concepts in a fun and engaging way.  Each die has three sides featuring three sides with large images and three sides featuring small images. This is an ideal way to introduce size concepts in a fun and interactive way. The larger size of the dice makes it easier for kids to see and manipulate the images.