Calibron 12 Puzzle | Impossible Brain Teaser for Adults
Calibron 12 Puzzle | Impossible Brain Teaser for Adults is backordered and will ship as soon as it is back in stock.
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Product Details
Product Details
Difficulty Level:
Delivery and Shipping
Delivery and Shipping
All standard orders normally ship within 1 business day.
Custom orders normally ship within 2 business days.
Description
Description
The Calibron 12 Puzzle is an extremely difficult wooden brain teaser originally designed in 1933 by Theodore Edison. This handcrafted puzzle challenges you to fit 12 uniquely shaped pieces into a perfect square—there’s only one solution!
Why You'll Love It:
- Extreme Challenge: One of the hardest puzzles ever made.
- Premium Craftsmanship: Hand-cut from Ash, Maple, Walnut, and other fine hardwoods.
- Precision Design: Each piece is laser-engraved for a seamless fit.
A perfect gift for puzzle lovers, engineers, and collectors. Includes a solution guide in case you need help!
Personalize it!
Personalize it!
Click YES above the quantity selector to add a personalized laser engraving to your puzzle or game.
- Perfect for gifts
- Business marketing opportunity
Recommended age group
Recommended age group
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Personalize It!
Did you know we can add a custom laser engraving to every puzzle and game? Well, we can. Add a personal touch to your gift with a name or message.

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Frequently Asked Questions
Shipping
What countries do you ship to?
What countries do you ship to?
We ship all around the world. If you encounter an issue at checkout, please use the Chat Box to contact us. A real person will assist you.
How long will it take to receive my order?
How long will it take to receive my order?
Standard shipping normally takes 3-5 days. Next-day shipping is available on all domestic orders (for an additional charge). International shipping times vary depending on the product and destination (estimated at checkout).
Expedited shipping is available at checkout.
Returns and Refunds
How do I return a product?
How do I return a product?
Items must be returned within 30 days after receiving your order. Items must be returned in the same condition in which they were received, be unworn/unused, have any tags still attached, and include all the original packaging.
Custom/Personalized items can only be returned if we made a mistake on the customization/engraving.
How long will it take to receive my refund?
How long will it take to receive my refund?
Refunds are processed within 7 days from when we receive the item(s).