Coin collectors, this 300-piece assortment of cardboard coin holders is exactly what you need to organize and protect your collection! You get six different sizes that cover most common coins: 50 holders each for pennies/dimes, nickels, quarters, half dollars, small dollars, and large dollars. The clear Mylar windows let you see both sides of your coins clearly, while the sturdy cardboard backing provides protection and a surface for writing important details like date, mint mark, or value. Each holder measures about 2x2 inches when folded, with window diameters ranging from 0.8 to 1.57 inches to fit various coin sizes perfectly. Using them is simple - just place your coin in the window, fold the cardboard over, and seal with staples or tape. The quality materials mean your valuable coins are protected from fingerprints, scratches, and environmental damage. Having 300 holders means you can organize a significant portion of your collection at once, or share with fellow collecting friends. These are perfect for beginners starting their first collection or experienced numismatists needing to replenish their supplies. They make an excellent gift for any coin enthusiast - much more practical and appreciated than you might think! Whether you're storing common circulation coins or valuable collectibles, these holders provide affordable, reliable protection that keeps your collection organized and in great condition for years to come.