Equivalent to 60 pieces of small squares or 540 square inches total. No limitations, scalable to build as big as desired by adding more pieces to create the masterpiece. The foundation and column or row support pieces in this 12 piece set in size 12"x9", 12"x3", 9"x3", 6"x6" that can be assembled either as a stand alone magnet tile geometry set or in conjunction with other PicassoTiles magnetic building blocks as integrated add-on pieces to create stable and stronger foundation for bigger and taller or supersized structures.