Each coin boasts a 40mm diameter and comes with a clear storage box, ensuring durability and resistance to rusts and for long preservations Great for businesses look to recognize employees, schools and organizations rewarding achievements, or individuals seek unique craft opportunities Discover the versatilities of our 10Pcs Blanks Challenge Coin, from iron with a golden / silver plating, great for personalizing engraving projects Elevates your creative projects with these engraving blanks coin, offering endlessly possibilities for creating bespokes commemorative items Great for award ceremonies, anniversaries, or any formal event where a customizable touch is appreciated