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Equations That Changed the World Spiral Notebook
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Here's a deep blue and gold math-inspired notebook that's here for your proofs, problem sets, and calculated plans. Let some of the most groundbreaking equations guide your studies and inspire you to find solutions to complex problems.
Designed in USA
100% Recycled
Compostable Packaging
Carbon Neutral Shipping
Built for use in the classroom, the lab, or the field, these sturdy hardcover spiral-bound notebooks are made in Europe and are available in standard A4 and A5 sizes.
The Helix series is built with high-quality 100% recycled paper and printed with soy inks, leaving a light footprint. Be inspired to ask the right questions, connect the dots (even when they’re really far apart), and keep pushing humanity forward, so that tomorrow is always brighter than today.
These notebooks feature a high-quality spiral binding that allows the cover to flip around completely. Go ahead and see for yourself – these are the notebooks your most brilliant ideas have been waiting for.
| Dimensions |
A5
|
| Page Count | 160 pages (80 sheets) |
| Paper Type | Lined (college rule) |
| Paper Feature | Perforated pages for clean tear-out |
| Paper Weight | 80 gsm |
| Binding | Spiral bound |
| Cover | Hardcover |
| Paper Composition |
100% recycled 100% post-consumer waste |
| Printing | Soy-based ink |
| Origin | Designed in Oregon Paper & board milled in Europe Made in Estonia |
Region |
Shipping Cost for orders €40+ |
Shipping Cost for orders less than €40 |
| EU | FREE | €5.95 |
| UK, EEA, Europe (non-EU), Türkiye | FREE | €9.95 |
| Middle East, Oceania, Asia | €35 | €35 |
| South America, South Africa | €40 | €40 |
If you live in the UK, EFTA, or anywhere outside of the EU, taxes and import fees may be due upon delivery.
For orders shipping to North America, use our USA website for quicker transit times and more affordable shipping costs.
Delivery to zip codes that UPS considers to be "Remote" are charged the UPS Extended Service area fee of €30 in addition to the standard shipping rates.
Orders are processed within 1-3 days (Monday-Friday)
Shipping by GLS & UPS 1-5 days
Please double check your shipping address before submitting your order. We are unable to update your address or cancel you order prior to shipping once it is in our system. If your package is returned to us due to an incorrect address or refused delivery, we will refund the cost of the items less a 20% restocking fee if the goods are still in saleable condition. Shipping costs are non-refundable. *Due to international customs policies, packages sent to customers in Türkiye that are refused by the recipient are ineligible for a refund.
To start a return please contact us using the contact form. Returns must be made within 30 days of placing your order.
Frequently Asked Questions
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We ship from The Netherlands to nearly all destinations within Europe, Asia, the Middle East, Oceania, South America & South Africa. You'll be able to select your country and add your address details at checkout. If you're able to find your country, we can ship to you!
Unfortunately at the moment, because of the current political situation, our shipping carriers have suspended delivery to Ukraine and Belarus, so delivery to these locations is not possible.
For destinations in North America & Central America, please visit our USA website.
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Region
Shipping Cost for orders €40+
Shipping Cost for orders less than €40
EU FREE €5.95 UK, EEA, Europe (non-EU), Türkiye FREE €9.95 Middle East, Oceania, Asia €35 €35 South America, South Africa €40 €40 If you live in the UK, EFTA, or anywhere outside of the EU, taxes and import fees may be due upon delivery.
For orders shipping to North America, use our USA website for quicker transit times and more affordable shipping costs.
Delivery to zip codes that UPS considers to be "Remote" are charged the UPS Extended Service area fee of €30 in addition to the standard shipping rates.
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We do our best to pack up orders within 1-2 business days. Orders ship via GLS or UPS depending on the weight and destination. Most orders arrive within 1-8 business days.
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When your order arrives, open it up and take a look. If anything isn't as expected, got damaged in transit, or doesn't fit properly, let us know and we'll make it right.
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No problem! We offer full and partial refunds and exchanges. Read more here.
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Due to the way we make our products, we are unable to customize single items. In general, we cannot change the kind of paper in the notebooks from what you see listed or change the colors, but we are always happy to hear what you'd like to see us make in the future!
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