Coin collectors and numismatists, this 400-piece set of coin capsules is exactly what you need to properly protect and display your collection. The inner dimension of approximately 21mm (0.83 inches) makes them perfect for smaller coins like dimes, foreign coins, or silver rounds up to that size. The transparent plastic lets you view both sides of your coins clearly without removing them from protection, which is crucial for maintaining condition and value. The crescent mouth design on the edge makes opening and closing much easier than fighting with completely smooth capsules. The thickened plastic construction feels durable and provides good protection against scratches, dust, and environmental damage. Having 400 capsules means you can protect a significant portion of your collection or have plenty available for future acquisitions. The snap-tight closure keeps coins securely in place while still allowing for easy access when you want to examine them more closely. They're ideal for organizing by year, type, or value, and the uniform size creates a clean, professional look for display. The rounded corners prevent sharp edges that could damage other capsules or storage containers. Whether you're a serious collector maintaining valuable coins or just starting out and want to protect your investments properly, these capsules offer affordable protection that's essential for preserving coin condition over time. They also make great gifts for fellow collectors who appreciate practical accessories that help maintain their collection's integrity and display appeal.