Thank you for viewing. This is a set of 16 theory suit buttons. All buttons are 1.5cm in diameter. The color is brown. The material is unknown. The word "theory" is engraved on the side of all the buttons in two places. These are buttons for the sleeves, inside chest pockets, back pockets of trousers, etc. Some of the buttons have faded "theory" lettering on the side. Please be aware of this. *These are used items, so please refrain from purchasing if you are sensitive to imperfections or are looking for a perfect item.