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Numismatic items, also known as exonumia, are collectible coins, paper money, tokens, medals, or other similar items struck as a memento, souvenir, or award, typically made of metal or alloy. These items often hold historical and cultural significance, with designs that represent various events, people, or organizations. They may also contain unique variations, errors, or rarities that add to their value and desirability among collectors. Numismatic items can be preserved in protective cases called slabs, which help maintain their condition and authenticity. The study and collection of numismatic items is a popular hobby for enthusiasts worldwide.