How to find your ring size at home
Journal · Buying guide
Getting your ring size right before you order matters, because every Glasaje ring is made to order in Melbourne. We cast it to the size you choose. Here is how to measure at home in a couple of minutes.

Which sizing system we use
Our rings are made in Australian and UK letter sizes, from J to U, in quarter sizes. Australia and the UK share the same letter scale, so a chart for one works for the other. If you only know your US number, the size chart on our ring size guide converts from millimetres, which is the reliable way to cross over between systems.
Method 1: string or paper
The easiest method, and it works well for most people.
- Cut a thin strip of paper or take a piece of string.
- Wrap it around the base of the finger you plan to wear the ring on, snug but not tight.
- Mark where the paper or string overlaps.
- Measure that length in millimetres against a ruler.
- Match it to the circumference column below.
Method 2: measure a ring you already own
If you have a ring that fits the same finger well, this is usually the most accurate method, and the best one when you are buying a gift.
- Place the ring flat on a ruler.
- Measure straight across the inside, edge to edge, in millimetres.
- Match it to the inside diameter column below.
Ring size chart
Whole letters are shown here as a quick reference. We also make every quarter size in between, so if you land between two letters you can order the exact fit. The full chart with all 45 sizes is on our ring size guide.
| Size (AUS / UK) | Inside diameter | Circumference |
|---|---|---|
| J | 15.5 mm | 48.7 mm |
| K | 15.9 mm | 50.0 mm |
| L | 16.3 mm | 51.2 mm |
| M | 16.7 mm | 52.5 mm |
| N | 17.1 mm | 53.8 mm |
| O | 17.5 mm | 55.1 mm |
| P | 17.9 mm | 56.3 mm |
| Q | 18.3 mm | 57.6 mm |
| R | 18.7 mm | 58.9 mm |
| S | 19.2 mm | 60.2 mm |
| T | 19.6 mm | 61.5 mm |
| U | 20.0 mm | 62.7 mm |
Tips for an accurate measurement
- Fingers are slightly larger in the evening and when warm. Measure at the end of the day.
- Measure two or three times and compare. One rushed reading is easy to get wrong.
- If you are between sizes, size up.
- For wide bands like the Baxter or the Dome, consider going up half a letter. A wider band sits closer to the finger and can feel tighter at the same measurement.
Not confident measuring at home?
We will send you a free ring sizer. It reads in whole and half letters, which is close enough for most fingers. If you measure between two, size up. If your size falls outside J to U, get in touch and we will make it for you in Melbourne.
If the fit is not right when it arrives, we resize within 30 days of delivery, and every piece carries a 12-month warranty.
Frequently asked questions
How do I measure my ring size at home in Australia?
Wrap a thin strip of paper around the base of your finger, mark where it overlaps, and measure the length in millimetres. Match that figure to the circumference column in the chart above to find your Australian letter size. You can also measure the inside diameter of a ring that already fits.
What ring size is most common in Australia?
For women, sizes around L½ to N½ are the most commonly ordered, which is an inside diameter of roughly 16.5mm to 17.3mm. For men, sizes tend to sit higher, around R to U. These are broad benchmarks only. Always measure rather than guess.
Do Australian and UK ring sizes match?
Yes. Australia, the UK, Ireland and New Zealand all use the same letter scale, so a UK chart converts directly.
Should I size up or down if I am between sizes?
Size up. A ring that sits slightly loose is easier to live with than one that is too tight, and it needs to clear the knuckle. Because we make quarter sizes, you may not need to round at all.
Do you make quarter sizes?
Yes. Every ring is made in quarter sizes from J to U. Since each piece is cast to order in Melbourne, we make the size you choose rather than sizing a stock band up or down.



