We understand the worry about buying custom rings online. There are 40+ sizes to choose from and it is a stressful task. We always recommend going to visit at least 2 local reputable jewelers to get your finger sized. Always make sure to try rings of the same width and fit of the ring you intend to buy, as these are factors that influence your ring size.

We make the process bulletproof by sending you a set of metal sample rings. Choose the size you believe fits you best and we will send you 5 rings that all vary 1/2 size from each other and include the size you selected as well. You will also be able to select the width between 3,5 and 7mm. If you are buying a ring that is not exactly that width, kindly select the closest one.

By using this service you are able to try on these rings for a few days to really get a feel of which size fits best all day long especially in the morning when you wake up as fingers tend to get swollen at that time of the day.

This is a stress free service as included in the package will be a prepaid return label that you can use to send the set of rings back to us, contact us once you are ready to send them back. There will be a £50 deposit which will be credited back along with an extra £10. You can use it towards the purchase of your ring once we receive the sample rings back. Shipping is included and you can try on the sample rings for up to 5 days before having to return them to be eligible for the credit.

For now, the service is only available to customers purchasing from the UK.

Rings under £500 can be resized or exchanged for a fee of £50 and can only be used once per ring ordered. We custom make each ring to order and unfortunately none of the styles we offer can be resized so we actually make you a new ring.

For rings over £500 the resize or exchange fee varies between 25% to 40% depending on the ring design. Contact us if you want to know an accurate fee based on the design you choose.

You must send the ring back in original condition within 30 days of receiving it. Buyer is responsible for shipping the rings back to us. Please send the ring/s back to the address below. Include the a note with order number.

Sesto Synergy UK
79 Camberwell Road
Flat 4
United Kingdom

Every ring that contains sensitive material such as the wood, deer antler and mineral is coated with a resin which is not only water proof but also chemical resistant which is very important if you intend to wear 24/7.

We offer free worldwide shipping. Upgrades are available for both domestic and international orders. For international orders we strongly recommend upgrading your shipping service to one of our courier options as shipping times have been increasing due to Covid-19 and we are not responsible for any delay or loss during the transit.

Currently our production time is 3-4 weeks and for ring containing any precious metal is 5-6 weeks. Rush Order service is available for a fee. This includes Royal Mail Special Delivery Guaranteed by 1pm® for domestic orders and a production time of 3-5 days. Please contact us if you need your ring urgently as we always try our best to accommodate our clients needs.

If you want to return your ring you please contact us first. There will be a 25% restocking fee for any ring returned. This is because we custom make each ring to order. 

We offer free refinishing service to all our rings. You can send your ring back to us anytime you would like and we will polish it and bring it back to its new look. Deep scratches cannot be removed but we do offer repair service if needed. Shipping cost are not included in this free service.

Accidents happen, if your ring needs repair contact us and include photos to help us understand the damage and allow us to quote accordingly for the repair. Any issues due to craftmanship will be repaired for free.

Yes, but please contact us before to make sure we have the material available for these sizes.

Carbon fiber is extremely lightweight but strong at the same time. You can easily forget that you are wearing a ring after a few hours. If you are looking for a heavier ring we would recommend steel or any precious metals like gold.

Yes, most of the dinosaur bone that we get comes from the UK in a place called Isle of Weight. We have a good relation with a supplier that lives there and has been sending us awesome pieces for a long time.

Yes. If you have a piece of wood or stone that has a sentimental value to it and would like to integrate it into one of our ring designs we can do that for you, just contact us through the custom request page.

Yes! Check it out here