Square Cardboard Coin Holder Boxes – 12 Sizes | Safe Storage
Square Cardboard Coin Holder Boxes – 12 Sizes | Safe Storage
Keep your coin collection organized, protected, and display-ready with these Square Cardboard Coin Holder Boxes. Available in 12 precise inner-diameter sizes — 17.5mm, 20.5mm, 23mm, 25mm, 26.5mm, 27.5mm, 29mm, 31.5mm, 33mm, 35mm, 37mm, and 40mm — these snug-fit storage boxes are ideal for collectors of all levels, from casual hobbyists to serious numismatists.
Each box is crafted from durable cardboard/paper material with a firm, coin-hugging inner aperture that keeps coins securely in place without scratching surfaces. The classic square profile allows neat stacking and easy drawer or shelf organization. With 12 color options available, you can color-code by denomination, era, country, or metal type — making sorting and retrieval a breeze.
Sizing tip: For the best fit, select a box whose inner diameter is approximately 0.5mm smaller than your coin's diameter. For example, a 39mm coin pairs perfectly with the 40mm box (38.5mm inner diameter).
Key Features
- ✅ 12 Size Options: 17.5 / 20.5 / 23 / 25 / 26.5 / 27.5 / 29 / 31.5 / 33 / 35 / 37 / 40mm inner diameters
- ✅ 12 Color Choices: Easily color-code your collection by type, era, or value
- ✅ Secure Fit: Snug inner aperture holds coins firmly without surface contact damage
- ✅ Stackable Design: Square shape stacks neatly for efficient storage in drawers, boxes, or display cases
- ✅ Lightweight Material: Durable cardboard construction — lightweight yet sturdy for long-term storage
- ✅ Versatile Use: Suitable for silver dollars, gold coins, copper pennies, commemorative coins, and more
Product Specifications
| Material | Cardboard / Paper |
| Available Sizes (Inner Diameter) | 17.5mm, 20.5mm, 23mm, 25mm, 26.5mm, 27.5mm, 29mm, 31.5mm, 33mm, 35mm, 37mm, 40mm |
| Color Options | 12 color choices available |
| Shape | Square |
| Best For | Coin collecting, numismatic storage, display, and gifting |
Note: Actual color may vary slightly from images shown on screen due to monitor brightness and display settings.
Perfect For
- Numismatists and coin collectors at any level
- Storing and displaying commemorative, bullion, or antique coins
- Organizing collections by denomination, date, country, or metal
- Gifting — a thoughtful addition to any collector's toolkit
For more information on coin collecting and preservation best practices, visit the Smithsonian Institution, a trusted resource for numismatic history and preservation.
Frequently Asked Questions
Q: What sizes are available for these square cardboard coin holder boxes?
A: These coin holder boxes come in 12 inner-diameter sizes: 17.5mm, 20.5mm, 23mm, 25mm, 26.5mm, 27.5mm, 29mm, 31.5mm, 33mm, 35mm, 37mm, and 40mm — covering a wide range of coin types from small pennies to large silver or gold coins.
Q: How do I choose the right size coin holder box for my coin?
A: Measure your coin's diameter in millimeters, then select a box with an inner diameter that is approximately 0.5mm smaller for a snug, secure fit. For example, a 39mm coin fits best in the 40mm box (which has a 38.5mm inner opening).
Q: What material are the coin holder boxes made from?
A: The boxes are made from durable cardboard/paper. This lightweight yet sturdy material is gentle on coin surfaces while keeping them securely in place for long-term storage and display.
Q: Can these coin boxes be stacked or stored in a drawer?
A: Yes! The square shape is specifically designed for neat stacking and organized storage in drawers, collector cases, or display shelves. The 12 available colors also make it easy to color-code your collection for quick identification.