This is a set of colorful and translucent magnetic buttons. These buttons can stick to iron surfaces like doors or white-boards etc. You can Use them to stick notes in the office, you can use them to stick papers, charts etc. on the white-boards. You can even use these buttons as markers. For example, you draw a graph on a whiteboard and you need to pinpoint a specific location on the graph, you can simply stick a button at that location. Made of plastic and magnet and size is 30mm.