Our classic wooden block set features 60 hardwood blocks in various shapes and sizes for endless building options. Basic building blocks are proportional in size (2.5 inches long, 5 inches long, and 7.5 inches long) to help children develop mathematical concepts. Versatile shapes engage children for hours of imaginative play as they explore the possibilities. We cut each block precisely, then sand all edges smooth before finishing with non-toxic, food grade mineral oil. Handcrafted of locally harvested Oregon alder.