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Measure a ring you already wear
Choose a ring that fits the same finger comfortably. Measure its inside diameter straight across the centre, from inside edge to inside edge. Repeat to check the result.
Ring size guide
Find your inSync ring size
Find your starting size below, then check the fit for your chosen design. Orbit fits slightly larger than our other rings. If you are between sizes, ask Iris before ordering.
Three easy sizes for sculptural inSync rings.
Quick size guide
Approximate US fit ranges. These describe the intended fit, rather than the measured dimensions of each ring. Orbit is the exception: it fits slightly larger than our other rings. See the separate Orbit size guide.
Small
US 5–6
Medium
US 7–8
Large
US 9–10
Measure your finger
Wrap a strip of non-stretch paper around the base of your finger without pulling it tight. Mark the overlap and measure the length in millimetres. This is your finger circumference, not the ring’s diameter. Check that the ring can also pass comfortably over your knuckle.
Allow for sculptural width
Wider bands can feel snugger than fine bands. If you are between sizes or comparing with a thin ring, ask Iris which size would suit your chosen design.
Best time to measure
Measure at the end of the day, when your hands are warm and your fingers are at their largest. Avoid measuring when your hands are cold, damp or swollen.
Buying a gift?
If you can borrow one of their rings, use the printable guide to match the inside edge to the circles. If you are unsure, ask Iris before ordering.
Printable reference
Print at 100% scale
The printable guide includes ring circles and a cut-out measuring strip. Make sure your printer is set to actual size or 100%, not “fit to page”.
What if I am between sizes?
Wider bands can feel snugger than fine bands. If you are between sizes or comparing with a thin ring, ask Iris which size would suit your chosen design.
Can I exchange if the size is wrong?
For an eligible current collection ring, contact Iris within 7 days of receiving your parcel. The ring must be unworn and unused, with its original packaging and proof of purchase. Exchanges depend on availability. Sale, custom and made-to-order pieces are excluded from change-of-mind exchanges. See our Returns and Repairs policy for postage costs and full details.
Need help choosing?
Email Iris before ordering and include the ring style, the finger you want to wear it on, and any measurements you have.