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Our team of experts is available to answer all your questions from assistance with your orders to style advice and gift ideas.
You may be able to find your ring size by measuring a ring you own that is a comfortable fit. If not, our guide below is on hand to take the guesswork out of ring shopping.
Alternatively, our jewellery experts are here to help. Speak with an expert or pop into one of our stores and we'll measure you on the spot.
Contact us| UK | US | EU | ⌀ Inside Diameter |
|---|---|---|---|
| F | 3 | 44 | ⌀ 14.0 mm |
| G | 3.5 | 45 | ⌀ 14.5 mm |
| H | 4 | 46.5 | ⌀ 15.0 mm |
| I | 4.5 | 48 | ⌀ 15.3 mm |
| J | 5 | 49.5 | ⌀ 15.6 mm |
| K | 5.5 | 50.5 | ⌀ 16.2 mm |
| L | 6 | 52 | ⌀ 16.6 mm |
| M | 6.5 | 53 | ⌀ 16.9 mm |
| N | 7 | 54.5 | ⌀ 17.2 mm |
| O | 7.5 | 55.5 | ⌀ 17.8 mm |
| P | 8 | 57 | ⌀ 18.1 mm |
| Q | 8.5 | 58 | ⌀ 18.5 mm |
| R | 9 | 59.5 | ⌀ 19.1 mm |
| S | 9.5 | 61 | ⌀ 19.4 mm |
| T | 10 | 62 | ⌀ 19.7 mm |
| U | 10.5 | 63.5 | ⌀ 20.4 mm |
| V | 11 | 64.5 | ⌀ 20.7 mm |
| W | 11.5 | 66 | ⌀ 21.0 mm |
| X | 12 | 67 | ⌀ 21.6 mm |
| Y | 12.5 | 68.5 | ⌀ 22.0 mm |
| Z | 13 | 69.5 | ⌀ 22.3 mm |
All deliveries are free of charge and our expert courier service will ensure your jewellery reaches you as quickly as possible.
If you are unhappy with your Jessica McCormack online purchase, we will be happy to arrange an exchange or full refund within 14 days.
The Hands-on Method
Measure an Existing Ring
A Chief Diamond Officer ring with one 10.02ct cushion cut diamond, set in a rub over setting in 18k white gold.
A Chief Diamond Officer ring with one 10.02ct cushion cut diamond, set in a rub over setting in 18k white gold.
