The Octagon Bolt Ring’s shape, as the name suggests, was inspired by mechanical forms; the angularity and symmetry of machines. The challenge was to create something which married this with the cleanliness and orderliness of Matthew Calvin’s designs, something which was arguably perfected in this eye-catching piece.
Available in Sterling silver, gold and rose gold plate, all with a high-polish finish which further draws the eye to the ring’s clean lines, many edges, and the way in which it catches the light as it turns and moves on a finger. The design is part of the wider Essentials collection -minimalist pieces that can be worn for any occasion.
Dreaming up these beautiful, simple pieces, designer Matthew Calvin was playing with basic shapes for a new range of jewellery, mixing them with quality-made, high-polish materials and finishes to create special yet everyday pieces.
Our rings come in four sizes as standard, however more sizes are available – as well as extra special touches like inscriptions. Just get in touch and we’ll create the perfect contemporary jewellery piece for you.
You can measure your own ring size easily at home, just cut a strip of paper and wrap it around your finger. If the paper rips, you’re wrapping too tightly and would have ended up with ring too small.
Mark where the strip meets itself, and measure to the nearest millimetre using a ruler.
We recommend ordering a size up if you fall between two options.
| US | UK | FR | mm |
| 4 3/4 | J | 48 3/8 | 48.7 |
| 5 3/4 | L | 51 7/8 | 51.2 |
| 6 3/4 | N | 53 3/8 | 53.8 |
| 7 1/2 | P | 55 1/4 | 55.7 |
All UK orders are sent via Royal Mail recorded and insured delivery. Your order should be with you within two working days and will require a signature upon receipt.
Orders of more than £30 qualify for free delivery; orders under £30 are subject to a £4 charge.
Orders to Europe and the rest of the world are free over £60; orders under £60 are subject to a £6 charge.
Delivery time is within 5 days for Europe and 10 days for the rest of the world.
Orders placed before 4pm (GMT) will be sent out the same day. Orders placed after 4pm (GMT) will be sent out the next business day.
If you require a shorter delivery period please get in touch at info@matthewcalvin.com and we can arrange an alternative delivery method.
We want you to love contemporary jewellery by Matthew Calvin. If for any reasons you want to return a purchase, please post your order to the address stated within the delivery invoice within 21 days of receipt.
Unless jewellery is damaged, you are responsible for the cost of returning the goods to us, we recommend that you insure the parcel for the value of the goods and retain all records of delivery.
In the interests of hygiene we cannot accept returns for pierced earrings.
If for any reason you’d like to return an item purchased from one of our amazing stockists, please contact them directly.
This returns policy is in addition to, and not instead of, your statutory rights.
Helen (verified owner) –
Absolutely delighted. Simply gorgeous!
Rosie (verified owner) –
Just love it. Such a nice gift!
Georgia –
I have this in all 3 colours and love them! Look lovely stacked with other rings, too. Such nice quality and catches the light beautifully.