Coin collectors, this 100-piece set of coin holders is exactly what you need to organize and protect your collection! Each capsule has an inner diameter of 27mm, perfect for coins that size or slightly smaller. The outer diameter is 32mm, giving your coins plenty of protection while keeping the cases compact. The clear plastic material lets you easily view both sides of your coins without ever having to remove them from the protective casing. The crescent opening design on the outside rim makes these capsules super easy to open and close - no struggling or breaking your nails trying to get them apart. Yet they snap together tightly to create a dust-proof, oxidation-resistant environment that keeps your coins in pristine condition. The included rectangular carrying box is perfect for storing all 100 capsules neatly organized. Whether you're a serious numismatist, just starting your collection, or need presentation cases for awards, gifts, or exhibitions, these holders are absolutely perfect. They're reusable, lightweight, and provide professional-level protection for your valuable or sentimental coins. The transparency means you can easily browse your collection without handling the coins directly, which helps prevent fingerprints and damage. If you want to preserve your coins' condition while being able to display and enjoy them, this 100-piece set gives you everything you need at a very reasonable price. Your collection will look so much more organized and professional!