{"product_id":"square-cardboard-coin-holder-boxes-12-sizes-safe-storage","title":"Square Cardboard Coin Holder Boxes – 12 Sizes | Safe Storage","description":"\u003cp\u003eKeep your coin collection organized, protected, and display-ready with these \u003cstrong\u003eSquare Cardboard Coin Holder Boxes\u003c\/strong\u003e. Available in 12 precise inner-diameter sizes — \u003cstrong\u003e17.5mm, 20.5mm, 23mm, 25mm, 26.5mm, 27.5mm, 29mm, 31.5mm, 33mm, 35mm, 37mm, and 40mm\u003c\/strong\u003e — these snug-fit storage boxes are ideal for collectors of all levels, from casual hobbyists to serious numismatists.\u003c\/p\u003e\n\n\u003cp\u003eEach 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 \u003cstrong\u003e12 color options\u003c\/strong\u003e available, you can color-code by denomination, era, country, or metal type — making sorting and retrieval a breeze.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSizing tip:\u003c\/strong\u003e 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).\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e12 Size Options:\u003c\/strong\u003e 17.5 \/ 20.5 \/ 23 \/ 25 \/ 26.5 \/ 27.5 \/ 29 \/ 31.5 \/ 33 \/ 35 \/ 37 \/ 40mm inner diameters\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e12 Color Choices:\u003c\/strong\u003e Easily color-code your collection by type, era, or value\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSecure Fit:\u003c\/strong\u003e Snug inner aperture holds coins firmly without surface contact damage\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eStackable Design:\u003c\/strong\u003e Square shape stacks neatly for efficient storage in drawers, boxes, or display cases\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eLightweight Material:\u003c\/strong\u003e Durable cardboard construction — lightweight yet sturdy for long-term storage\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Suitable for silver dollars, gold coins, copper pennies, commemorative coins, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCardboard \/ Paper\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Sizes (Inner Diameter)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.5mm, 20.5mm, 23mm, 25mm, 26.5mm, 27.5mm, 29mm, 31.5mm, 33mm, 35mm, 37mm, 40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 color choices available\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSquare\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCoin collecting, numismatic storage, display, and gifting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Actual color may vary slightly from images shown on screen due to monitor brightness and display settings.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eNumismatists and coin collectors at any level\u003c\/li\u003e\n  \u003cli\u003eStoring and displaying commemorative, bullion, or antique coins\u003c\/li\u003e\n  \u003cli\u003eOrganizing collections by denomination, date, country, or metal\u003c\/li\u003e\n  \u003cli\u003eGifting — a thoughtful addition to any collector's toolkit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on coin collecting and preservation best practices, visit the Smithsonian Institution, a trusted resource for numismatic history and preservation.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What sizes are available for these square cardboard coin holder boxes?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I choose the right size coin holder box for my coin?\u003c\/h4\u003e\n\u003cp\u003eA: 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).\u003c\/p\u003e\n\n\u003ch4\u003eQ: What material are the coin holder boxes made from?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can these coin boxes be stacked or stored in a drawer?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What sizes are available for these square cardboard coin holder boxes?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"How do I choose the right size coin holder box for my coin?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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. 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