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Australian Made AUSTRALIAN MADE
20+ Years of Expertise 20+ YEARS OF EXPERTISE
Made to Order MADE TO ORDER
FREE INSURED DELIVERY
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HOME / RING SIZE GUIDE
Sizing & Measurement

Find Your Perfect Fit

Choosing the right ring size is important for a comfortable and secure fit. For the most accurate result, we recommend having your finger professionally measured by a jeweller.

Measure a Ring That Already Fits

If you already own a ring that fits the intended finger comfortably, you can find your size in three simple steps:

  1. Select the right ring: Choose a ring that is worn on the exact same finger and hand as your new piece.
  2. Measure the diameter: Use a precise ruler or vernier caliper to measure the inside diameter (from one inner edge to the opposite inner edge at the widest point in millimetres).
  3. Compare with the chart: Match your measured millimetres with the Ring Size Chart below to find your AU/UK size.

Ring Size Chart

Australian and British sizes use letters (A–Z), while US sizing uses numbers. Use the inside diameter (mm) as your primary reference.

AU / UK Size US Size Inside Diameter (mm) Inside Circumference (mm)
H414.9 mm46.8 mm
I4.515.3 mm48.0 mm
J515.7 mm49.3 mm
K5.516.1 mm50.6 mm
L616.5 mm51.9 mm
M6.516.9 mm53.1 mm
N717.3 mm54.4 mm
O7.517.7 mm55.7 mm
P818.1 mm57.0 mm
Q8.518.5 mm58.3 mm
R918.9 mm59.5 mm
S9.519.4 mm60.8 mm
T1019.8 mm62.1 mm
U10.520.2 mm63.4 mm
V1120.6 mm64.6 mm
W11.521.0 mm65.9 mm
X1221.4 mm67.2 mm
Y12.521.8 mm68.5 mm
Z1322.2 mm69.7 mm

* International size conversions are approximate and may vary slightly between sizing standards. Inside diameter should be used as the primary measurement reference.

Printable Ring Size Guide

Already have a ring that fits? Print our official Ring Size Guide to place your existing ring directly over actual-size circles and confirm your perfect fit.

DOWNLOAD PRINTABLE GUIDE (PDF)
Important Printing Instructions: Ensure your printer is set to 100% / "Actual Size" (do not select "Fit to Page" or "Scale to Fit"). Verify the 50 mm calibration line with a ruler before measuring.

Sizing Tips & Considerations

  • Dominant Hand: Your dominant hand is often slightly larger than your non-dominant hand. Always measure the specific finger where the ring will be worn.
  • Temperature & Time of Day: Fingers naturally swell in the evening and in warmer weather, while cold weather can cause them to shrink. Measure when your hands are at a comfortable room temperature.
  • Knuckle Consideration: If your knuckle is significantly larger than the base of your finger, measure both your knuckle and the base, then choose a size in between so the ring slides over smoothly yet stays secure.
  • Ring Band Width: Wider bands (over 4 mm) feel more snug on the finger than delicate, slim bands. If choosing a wide band design, you may want to go half a size up.

Complimentary 30-Day Resizing

We want your Arlena piece to fit seamlessly. If your ring isn't quite the right fit upon arrival, we offer a complimentary first resize within 30 days of delivery on all eligible rings.