Card holders are small accessories designed to store and organize various types of cards, such as credit cards, business cards, and identification cards. They come in various materials, including leather, plastic, and fabric, and can be found in different styles and sizes to suit individual preferences. Card holders help keep cards safe from damage and make it easier to access them when needed. Many card holders feature slots or pockets that allow for easy organization. Some may also include additional features like RFID protection to prevent unauthorized scanning of cards. Overall, card holders are practical items for anyone who carries multiple cards regularly.