Childcraft math book set helps build early math concepts, and has five soft cover titles with rhyming text and colorful photos for engaging young children. Each book has 16 pages for reading, and measures 14.0 x 20.0 inches (L x H). (L is length, the horizontal distance from left to right; H is height, the vertical distance from the lowest to highest point.) The set is suitable for early childhood learning environments and elementary grade level.