RING SIZE GUIDE
Step 1. Place your credit card on the screen below. Adjust the slider with the + and - buttons or drag the anchor point until the size of the picture matches the size of your credit card, then click Show Ring Size. This sets the screen at the right dimensions so the ring size will be accurate
Step 2. Placing an existing ring on the chart’s circles until you match your ring’s size. LUMI uses US sizing, the number inside the circle corresponds to that specific size.
- Size 3
- Size 3.5
- Size 4
- Size 4.5
- Size 5
- Size 5.5
- Size 6
- Size 6.5
- Size 7
- Size 7.5
- Size 8
- Size 8.5
- Size 9
- Size 9.5
- Size 10
Finger size changes depending on the time of the day and the weather. For best results measure your finger size at the end of the day. Do not measure your finger when it is very hot and very cold. Make sure that the chosen size leaves enough room for the ring to pass easily along the entire length of the finger.
Step 1
Wrap a strip of paper around your finger where you’d like your ring to be.
Step 2
Make sure that the paper is pulled snug to your finger, the tighter the better, to find your best fit.
Step 3
Mark the spot where the paper meets and measure the distance with a ruler (mm).
The distance will be the circumference in mm, use the below chart to determine what the size is in US.
| Diameter(mm) | Circumference (mm) | US/CA (LUMI Size) | HK | UK/AU | EU | JP |
|---|---|---|---|---|---|---|
| 14.1 | 44.3 | 3 | 6 | F | 44 | 4 |
| 14.5 | 45.5 | 3.5 | 7 | F½ | 45 | 5 |
| 14.9 | 46.8 | 4 | 9 | H | 47 | 7 |
| 15.3 | 48 | 4.5 | 10 | I | 48 | 8 |
| 15.7 | 49.3 | 5 | 11 | J½ | 49 | 9 |
| 16.1 | 50.6 | 5.5 | 12 | K½ | 50 | 10 |
| 16.5 | 51.9 | 6 | 13 | L½ | 52 | 11 |
| 16.9 | 53.1 | 6.5 | 14.5 | M½ | 53 | 13 |
| 17.3 | 54.4 | 7 | 16 | N½ | 54 | 14 |
| 17.7 | 55.7 | 7.5 | 17 | O½ | 55 | 15 |
| 18.1 | 57.2 | 8 | 18 | P | 57 | 16 |
| 18.5 | 58.2 | 8.5 | 19 | Q½ | 59 | 17 |
| 18.9 | 59.3 | 9 | 20.5 | R | 60 | 18 |
| 19.4 | 60.9 | 9.5 | 22 | S½ | 61 | 19 |
| 19.8 | 62.3 | 10 | 23 | T½ | 62 | 20 |
