My Best Blocks are good quality hard maple wooden building blocks. These are medium in size and are constructed on a 1” basis. The Master set includes 104 pieces of wooden blocks. This size is perfect for toddlers in weight and manageability of the blocks. The unit block measures 1” x 2” x 4”. All other blocks are designed as multiples of this unit block so differing elements can be stacked to equal each other. These wooden blocks are available in typical shapes—squares, rectangles, cylinders, arches, triangles, and half circles. There are three sets of “My Best Blocks” available: Junior set, Advanced set and Master set. Sanded smooth with no finish. Made in the USA. Lifetime Guarantee.