Graces Dawn&reg; Hand-blown Glass Sand Timer Magnet Magnetic Hourglass Beautiful wooden base Materials:glass,Solid wood,magnetic,and iron filings Dimensions (hourglass):5.7" high x 2.4" diameter;Dimensions (base):3.1" x 3.1" x 0.7" The Magnetic Sand Hourglass is a fun desktop diversion. Flip it over and watch the grains of iron stack up in seemingly impossible formations thanks to a magnet embedded in the iron base. Watching time fly has never been so interesting!The craggy configurations of the iron filings eventually build into an ordered hemisphere with a spiky surface. Like your favorite movie, you can enjoy watching the Magnetic Sand Hourglass over and over again.