Not sure which ring size to choose? Our plastic ring sizer helps you check the fit at home. The sizer itself is free; postage and packaging are extra.
To request help with a sizer, call +44 (0)161 537 6773 or email hello@lilyarkwright.com. We can confirm delivery options and charges for your address.
Updated 10 November 2026
Before choosing a design from our stunning moissanite ring collection, check the fit on the finger and hand where you plan to wear it.
Thread the end of the sizer through its buckle to make a loop. Slip it onto your finger and adjust it until it sits comfortably at the base.
Check that it passes over your knuckle without forcing it, then read the letter at the marker. The sizer uses British letter sizes.
Available sizes depend on the design. Check the options for your chosen ring and ask us if the size you need is not listed.
A broad band can feel different from a narrow sizer. If you are between measurements or unsure about the fit, tell us which ring you have in mind before ordering.
An existing ring is most useful if it already fits the intended finger on the same hand. A ring worn on another finger or the opposite hand is only a starting point.
Marking where someone else’s ring sits on your own finger will not give an exact measurement. If you are keeping a proposal secret, our team can help you work through the options.
Once you know your size, our team can help you compare designs and think about how the ring will feel when worn.
The Lily Arkwright blog also has guides to stones and settings. The links below include our 2021 celebrity-trends archive:
If you are planning a trip around your proposal, Truly’s unique experience packages may offer ideas. Check current availability and terms before booking.
Finger size can change during the day and with temperature. Measure when your hands feel neither unusually hot nor cold, and check again later rather than relying on one reading.
We offer one complimentary resize within 12 months of delivery for eligible rings. Some designs, including full-set eternity rings and certain ornate, bespoke or personalised rings, cannot be resized. Ask us to confirm the options for your ring.
For help with a measurement, let our team know which finger you measured, the readings you took and the ring design you are considering.
