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How to find your ring size

Finding the right size for rings can be a challenge. Most of our rings are adjustable, so you can wear them on different fingers and achieve the look you desire. We also have some rings available in different sizes. Use our size guide below to find the perfect ring size for you.



If you already have a ring that fits perfectly, it’s easy. Just grab a ruler and measure the diameter from edge to edge on the inside of the ring. There you go! You now have the measurements in mm for your ideal size.


If you don’t have a ring that fits perfectly, you can use a piece of string, a ribbon, or tape and wrap it around your finger as far down as possible. Mark where it overlaps and measure the length to find the circumference of your finger. It’s super easy.


Use our size guide on the left to find the perfect size for you.

Still unsure about your ring size? Contact us.

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Designed with a spotlight on the finest materials, Aiu Aio jewelry transcends seasons. Each collection, our dedicated team designs and hand-select quality metals, such as sterling silver and gold plating.

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How long delivery time?

Designed with a spotlight on the finest materials, COS women’s jewellery transcends seasons. Each collection, our dedicated women’s jewellery team hand-select quality metals, such as recycled brass, gold plating and sterling silver, which are then carefully polished and sculpted into refined, outfit-defining pieces.

The women’s jewellery edit harmonises chunky hoop earrings for the everyday and pearl-adorned necklaces and brooches that nod to a maximalist sensibility.

About secure payment

At Aiu Aio, you make your payment through a secure, encrypted connection.


Encrypted Payment
The payment is processed through a PCI DSS certified payment gateway. This means your payment information cannot be read by external parties, ensuring the highest possible security.


Which payment methods do you accept?
At Aiu Aio, you can pay for your items with various payment cards, MobilePay, Visa, and MasterCard. All prices on include VAT.


No card fees

  • Dankort/Visa/Visa Debit cards – No fees charged
  • MasterCard/Eurocard/JCB (international) – No fees charged

The amount for the items is only charged when the items are shipped from Aiu Aio. Aiu Aio can never charge more than the amount you have approved at the time of purchase.

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