These are high-quality buttons used by designer and factory brands. They have a beautiful light blue to green marble color. Approximately 25mm Approximately 20mm Approximately 15mm 9 pieces each There are individual differences due to the natural materials. I believe the material is likely nut button, but please be aware that there is a possibility of other materials. Not only for replacing buttons on brand-name items, but also on items like Uniqlo and fast fashion, changing the buttons can give them a more luxurious feel. I hope someone will use them.