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Frequently Asked Questions
GENERAL
The following payment methods are available to you: PayPal, purchase on invoice with Klarna, installment payment with Klarna, immediate payment with Klarna, credit card, bank transfer, Amazon Pay, Apple Pay, Google Pay, Shop Pay, Bancontact, eps transfer and iDEAL.
First, you should check the spam folder of your email inbox. Sometimes it may have ended up there.
However, it is also possible that the email address you provided was incorrect, and that is why you did not receive an email. Unfortunately, it only takes one letter to be wrong or a digit to be transposed.
If you have not received a confirmation email, please send us an email via info@kohlenstoff-12.com and we will send it to you as soon as possible.
SIZES
The specified sizes indicate the total length of the bracelet including the clasp. Alternatively, a size chart for determining the size by your wrist circumference is provided in the respective product description under "DETAILS".

This is how you measure your wrist circumference: Measure at the desired spot so that the tape measure fits snugly against the skin (do not pull tightly). Now you can read the correct size from the size chart. If you fall between two sizes, choose the larger size.
If you don't have a tape measure handy, you can wrap a piece of string/thread or a strip of paper around your wrist and mark the spot where the two ends overlap. Finally, lay it on a ruler or yardstick to read the measurement.

We want to make sure you find exactly what you are looking for. Take a look at our illustration and find your desired chain length.

If you don't have a tape measure at hand, you can wrap a piece of string/thread or a strip of paper around your finger and mark the spot where the two ends overlap. Finally, lay it on a ruler or folding rule and you can read the measurement. Using the adjacent table, you can then select the correct size.
Through our returns portal, you can exchange your order or part of your order for a different size. Returns from Germany are free of charge. In addition, we cover the reshipment of your desired size.

Write a clear and concise answer to guide your customers.

Write a clear and concise answer to guide your customers.
SHIPPING & RETURNS
We ship worldwide free of charge with DHL from an order value of 80€.
Below 80€, the shipping costs are 3.90€ within Germany, and 4.40€ outside Germany.
Germany 1-3 working days
Europe 2-10 working days
World 5-20 working days
Through our returns portal, you can exchange your order or part of your order for a different size or return it completely.
Exchanges for a different size/length are free of charge. In the case of a return, the customer bears the cost of the return shipping.
Yes! If you need a different size of your ordered product, you can easily initiate a free exchange through our returns portal. Unfortunately, an exchange for a different product is currently not possible.
We ship directly and without detours from Sonsbeck, NRW.
No problem. An exchange for a suitable size is still possible after the fourteen-day withdrawal period. If you need a different size of your ordered product, you can easily initiate a free exchange through our returns portal. Unfortunately, an exchange for a different product is not yet possible.
Extended exchange and return policy from 08.11.2024:
For all orders placed from 08.11.2024 to 28.12.2024, there is an extended exchange and return policy until 12.01.2025.
MATERIAL & CARE
It is our claim to offer you durable jewelry with the highest
quality that can accompany you everywhere, so you don't have to worry about damaging it. For this reason, most of our products are made of 316L stainless steel and specially coated with DLC "Diamond-like Carbon." But to complement our unique design, many of our products are refined with carbon or forged carbon, or, like our pendants, made from 100% carbon.
Most people know carbon from the automotive industry but don't really know what lies behind this unmistakable appearance. Actually, the material "carbon" doesn't really exist. The material we use, which can also be found in cars, bicycles, or airplanes, is a composite material or a material mix. Carbon here refers to carbon fibers embedded in a plastic matrix. This so-called matrix consists of an epoxy resin, which is a mixture of various
chemical substances. This gives the carbon fibers their stability. This material mix creates a material that has high durability but is also very lightweight
is. Once the carbon has fully cured, it is crafted on-site by us into your jewelry pieces. Out of dedication to this complex material, we have aligned our brand and embedded it in our name.
"Forged Carbon is a bit less known. The pattern of"
"'Normal carbon' is uniform and not individual. Whereas Forged Carbon is a bit more exciting and the surface somewhat resembles marble. Lamborghini started it. They were among the first to use the material extensively on their cars, which made it well known. The production is similar to conventional carbon, only with Forged Carbon fiber chips instead of whole strands are placed in epoxy resin. Thus, it is also made like carbon and can be further processed by us."
That is not a problem, you can have any product engraved at the local jeweler or similar. Our carbon pendants and rings can also be engraved without any issues. Unfortunately, we can no longer offer this service.
There are various advantages of stainless steel jewelry compared to silver or gold jewelry:
Durability: Stainless steel is a very robust material and resists scratches, wear, and rust. In comparison, gold and silver jewelry can be easily scratched and tarnish, which shortens their lifespan.
Price: Stainless steel is generally more affordable, making it an economical alternative.
Ease of care: Stainless steel is easy to maintain and does not require special cleaning agents or procedures. Silver and gold jewelry, on the other hand, often require special cleaning to preserve their shine and beauty.
Allergy friendliness: Stainless steel is hypoallergenic and therefore well suited for people with sensitive skin or allergies to other metals like silver.
Versatility: Stainless steel can be made in various colors and surface finishes, making it a versatile option for jewelry designers. Fine jewelry usually has a more limited selection of designs and styles.
Loss: Some people know it: If you ever lose a piece of jewelry or it even gets stolen, the loss is more bearable.
ABOUT US
A large part of our products is manufactured directly by us in Sonsbeck, NRW. From here, every order goes out into the world.
We use special materials for our products. In addition to 316L stainless steel, carbon, and forged carbon, high-quality DLC coatings are also used for our jewelry and watches. We have high standards for the quality and durability of our products.
The K12 Inner Circle offers many benefits. You can register for free and secure exclusive advantages and services. These include, among other things, discounts, early access to new collections, and maybe even one or two secret drops...
The K12 Inner Circle offers many benefits. You can register for free and secure exclusive advantages and services. These include, among other things, discounts, early access to new collections, and maybe even one or two secret drops...
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