MATHILDE BRUXELLES · SIZING GUIDE
Find Your Comfortable Ring Fit
Choosing your ring size starts with a simple measurement.
Follow the steps below, then compare your result with our
approximate conversion chart. Always check the sizing information
on the individual product page before ordering.
A helpful tip:
Measure when your hands are at a comfortable room temperature.
Repeat the measurement a few times, as finger size can vary
throughout the day. A jeweller’s ring sizer provides a more
reliable result than paper or string.
How to Measure Your Finger
1
Prepare a Paper Strip
Cut a narrow strip of paper approximately 10 cm long. Have a pen and a ruler marked in millimetres ready.
2
Wrap Around Your Finger
Wrap the paper around the base of the finger you will wear the ring on. Keep it snug without squeezing.
3
Mark the Meeting Point
Mark where the paper overlaps. Check that the loop can also pass comfortably over your knuckle.
4
Measure in Millimetres
Lay the strip flat and measure to your mark. This is your approximate finger circumference.
Ring Size Conversion Guide
Australian sizes generally use the same letter system as UK sizes.
Conversions below are approximate and may vary between suppliers.
| US Size |
Inside Diameter (mm) |
Circumference (mm) |
AU / UK Size |
| 4 |
14.9 |
46.8 |
H |
| 5 |
15.7 |
49.3 |
J ½ |
| 6 |
16.5 |
51.9 |
L ½ |
| 7 |
17.3 |
54.4 |
N ½ |
| 8 |
18.2 |
57.0 |
P |
| 9 |
19.0 |
59.5 |
R |
| 10 |
19.8 |
62.1 |
T |
| 11 |
20.6 |
64.6 |
V |
| 12 |
21.4 |
67.2 |
X |
| 13 |
22.2 |
69.7 |
Z |
This chart shows size conversions, not the sizes available for every
ring. Refer to each product’s size options and measurements.
Between Two Sizes?
Measure again before choosing. If your result falls between sizes, contact us with your measurement and the ring you are considering.
Temperature Can Affect Fit
Cold hands may measure smaller, while heat can cause swelling. Avoid measuring immediately after exercise or when your hands are unusually hot or cold.
Remember Your Knuckle
If your knuckle is wider than your finger’s base, measure both. Your ring needs to pass over the knuckle without fitting too loosely at the base.
Consider the Band Width
Wider bands can feel tighter than narrow bands in the same size. Check the product’s fitting advice or ask a jeweller to measure you with a similar-width band.
Need a Hand Choosing Your Size?
Send us your measurements and the name of the ring you love. We’ll help you understand its sizing before you order.
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