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Contact Us
Our team of experts is available to answer all your questions from assistance with your orders to style advice and gift ideas.
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10.02ct Chief Diamond Officer Ring
Price Available on Request
Change Location
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 usSize Chart
The symbol ⌀ used in the table below indicates diameter measurement| 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 |
Product Details
- Stone: Diamond
- Shape: Cushion
- Metal: 18K White Gold
- Total Carat Weight: 10.02ct
Delivery & Returns
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
- Grab a tape measure, length of string or strip of paper.
- Wrap it around the finger you’ll wear your ring on—if you’re creating a ring stack, consider where on your finger the ring will sit—and mark the place where it joins.
- Lay your string or paper strip on a flat surface and use a ruler to measure the length up to the mark. Use the chart above to match the measurement to the closest Tiffany ring size.
Measure an Existing Ring
- Choose a ring that already fits your finger well.
- Measure the interior diameter of the ring in millimeters (mm)
- Use the measurement chart above to match the size of your ring to the closest size in mm.
