Ring Sizing Guide Australia — How To Measure Your Ring Size At Home
Free ring sizing guide for Australia. How to measure your ring size at home using string or paper. Australian, US, UK and European ring size conversion chart with instant calculator. Ruhuna Gemstones Brisbane.
Ruhuna Gemstones · Guide
Ring Sizing Guide
Getting your ring size right matters — especially for a Signature Setting made to order around your exact stone. Here is everything you need to measure accurately at home, with a full international conversion chart.
Measuring With String Or Paper
The most reliable at-home method. All you need is a thin strip of paper or a piece of string, a pen and a ruler.
01
Wrap
Wrap the paper or string snugly around the base of the finger you intend to wear the ring on. It should sit comfortably — not tight, not loose.
02
Mark
Mark the point where the paper or string overlaps with a pen. This marks the circumference of your finger.
03
Measure
Lay the paper or string flat and measure the length in millimetres from the end to your mark. This is your finger circumference.
04
Convert
Enter your measurement into the calculator below — or use the full conversion table to find your size.
Measure Three TimesFinger size changes throughout the day — fingers are slightly larger in the evening and in warm weather. Measure at the end of the day for the most accurate result. Take three measurements and use the average.
Measuring An Existing Ring
If you already own a ring that fits the correct finger well, this method is even simpler.
01
Place The Ring
Place the ring flat on a ruler or piece of white paper.
02
Measure The Diameter
Measure the internal diameter of the ring in millimetres — the distance across the inside of the ring from one inner edge to the other.
03
Convert
Use the calculator below or the diameter column in the conversion table to find your ring size.
Find Your Ring Size
Enter the circumference you measured, and we'll tell you your ring size across all major systems.
Enter Circumference
mm
Australia / UK
—
USA / Canada
—
Europe
—
Diameter
—
If your measurement falls between sizes, we recommend sizing up.
International Ring Size Chart
Australian ring sizes follow the same system as the United Kingdom — alphabetical sizing from A to Z. Use the chart below to convert between Australian, US, UK and European sizing.
| Diameter (mm) | Circumference (mm) | Australia / UKAustralia | USA / Canada | Europe |
|---|---|---|---|---|
| 13.21 | 41.50 | D | 2 | 41.5 |
| 13.61 | 42.76 | E | 2.5 | 43 |
| 14.05 | 44.14 | F | 3 | 44 |
| 14.36 | 45.11 | G | 3.5 | 45 |
| 14.65 | 46.02 | H | 3.75 | 46 |
| 15.04 | 47.25 | I | 4.25 | 47 |
| 15.40 | 48.38 | J | 4.75 | 48.5 |
| 15.80 | 49.64 | K | 5.25 | 50 |
| 16.10 | 50.58 | L | 5.5 | 51 |
| 16.51 | 51.87 | M | 6 | 52 |
| 16.92 | 53.16 | N | 6.5 | 53 |
| 17.35 | 54.51 | O | 7 | 54.5 |
| 17.75 | 55.76 | P | 7.5 | 56 |
| 18.19 | 57.15 | Q | 8 | 57 |
| 18.61 | 58.47 | R | 8.75 | 58.5 |
| 19.10 | 60.00 | S | 9.25 | 60 |
| 19.51 | 61.29 | T | 9.75 | 61.5 |
| 20.02 | 62.89 | U | 10.25 | 63 |
| 20.32 | 63.84 | V | 10.75 | 64 |
| 20.76 | 65.22 | W | 11.25 | 65 |
| 21.18 | 66.54 | X | 11.75 | 66.5 |
| 21.49 | 67.51 | Y | 12 | 67.5 |
| 21.89 | 68.77 | Z | 12.5 | 69 |
The highlighted rows represent the most common ring sizes for women in Australia — sizes J through O.
Tips For An Accurate Fit
Time Of Day
Fingers are slightly larger in the evening and in warm weather. Measure at the end of the day for the most accurate result — never first thing in the morning.
Temperature
Cold temperatures cause fingers to contract. If you measure in winter or air conditioning, your measured size may be slightly smaller than your true comfortable wearing size.
Band Width
Wider bands fit more snugly than narrow ones. If your setting has a band wider than 6mm, consider going half a size up from your measured size for a comfortable fit.
Knuckle Size
If your knuckle is significantly larger than the base of your finger, size to your knuckle so the ring can be put on and taken off comfortably — it will sit slightly loose at the base.
Measure Multiple Times
Take at least three measurements on different days and at different times. Use the average for the most reliable result.
When In Doubt
If you are between two sizes, size up. A ring that is slightly too large can be resized down more easily than one that is too small.
ResizingAll Ruhuna Signature Creations can be resized after delivery if needed. We recommend confirming your size via consultation before your piece is made — but if your size changes, we will always find a solution.
Ring Sizing — Common Questions
Wrap a thin strip of paper or a piece of string snugly around the base of your finger, mark where it overlaps, then lay it flat and measure the length in millimetres. Enter that measurement into the calculator above to get your exact Australian size instantly.
Ring size letters and numbers differ by country, so an Australian "N" isn't the same as a US "N". Use the international conversion chart above, or enter your finger circumference into the calculator to see all four sizing systems side by side.
There's no pressure to know your size in advance. A local jeweller can confirm it in person, usually at no charge — or book a private consultation with us and we'll guide you through it and confirm your size before your piece goes into production.
Yes. For every Signature Creation and bespoke commission, we confirm ring size during the consultation process before any crafting begins — so you never need to guess before reaching out.
We Can Help
If you are unsure of your size, the most reliable option is to visit a local jeweller for a professional sizing — most will do this at no charge. Alternatively, book a private consultation with our Brisbane atelier and we will guide you through the process and confirm your size before your piece goes into production.
For Signature Creations and bespoke commissions, we always confirm ring size during the consultation process before crafting begins. There is no pressure to know your size before reaching out — that is exactly what the consultation is for.
Signature Creations · Handcrafted In Brisbane
Ready To Begin?
Book a private consultation and we will confirm your size, walk you through our current collection and begin your Signature Creation together.