It is round, colorful, and comes in many different colors. It's the fancy button you can put anywhere! How many do you want? 2-hole shell button "Akoya", natural border and lacquered, colored center. Very thin, it varies between 0.8 and 1.2 mm in thickness and measures 22 mm in diameter. Care advice: Before dry cleaning or machine washing your garment, it is advisable to unsew the buttons. If you machine wash them, wrap them in household aluminum foil, wash the garment inside out to avoid shocks, no soaking, gentle spin, hang immediately. What is Akoya? : A type of oyster, it is a naturally iridescent and pearly shell found in Japan.