⑥ Buttons - Set of 17 (Large: 14, Small: 3) Thank you for viewing. The back side is light blue. Not sold separately. ■ Size Large: Diameter: Approximately 10mm Thickness: Approximately 2mm Small: Diameter: Approximately 9mm Thickness: Approximately 2mm (Please note that there may be slight variations due to personal measurement.) ■ Note: We cannot accept cancellations after the item has been shipped. Please refrain from purchasing if you are overly sensitive or concerned about minor imperfections. Thank you for your understanding that these are used items. Thank you for your consideration (^-^)