Ring Size Chart & Size Guide Australia

Getting the ring size right matters more than most buyers expect, particularly for engagement rings where the wearer will live with the fit for decades. Australia uses the alphabetical sizing standard (A through Z, with half sizes), while the United States uses numbers, Europe uses circumference in millimetres, and Japan uses its own numbering. Working between these systems means knowing the right conversion for whichever ring you are buying or sizing.

This guide walks through the international ring size conversion chart, how to measure ring size at home, how to find a partner’s size for a surprise proposal, and how we approach sizing at the Stelios Jewellers workshop in Mt Hawthorn. Stelios Palioudakis took over the studio in 2007, and we offer a free ring sizer to any Perth client who wants the most accurate measurement before commissioning.

International Ring Size Conversion Chart

You can download our ring size guide HERE or see it below

The average ring size for Australian women sits between L and N (US 6 to 7), and for Australian men between R and U (US 9 to 10.5). Knuckle size, hand width and finger length all shift the actual figure for any individual.

How To Measure Your Ring Size At Home

The most accurate at-home method uses a strip of paper or string and a ruler. Wrap the paper around the base of the finger you intend to wear the ring on, mark where the ends meet, lay the paper flat, and measure the length in millimetres. The figure equals the inside circumference of the ring. Match the circumference to the chart above to find your size.

A few practical notes for a very good estimate. Measure at the end of the day when fingers are at their natural full size; morning measurements often run small. Avoid measuring when hands are cold (fingers shrink) or after exercise (fingers swell). Take the measurement two or three times to make sure the result is consistent.

If your knuckle is wider than the base of the finger, choose a size that fits over the knuckle without forcing. The ring will sit slightly loose on the finger but slide over the knuckle without struggle.

Measuring An Existing Ring

If you already own a ring that fits perfectly on the intended finger, measuring its inside diameter or inside circumference gives the most accurate result. Lay the ring flat and measure straight across the inside opening with a ruler. Match the diameter against the chart for the correct size.

This method works particularly well for surprise proposals. If you can quietly borrow a ring your partner already wears and bring it into our Mt Hawthorn workshop, we can size from it directly using bench sizing tools and convert to the international standard you need.

Surprise Proposals: How To Find Her Ring Size

The challenge of every surprise engagement is finding the right ring size without giving away the surprise. Several approaches work, in roughly descending order of reliability:

Borrow a ring she wears regularly, with the cooperation of a close friend or family member, and bring it into the workshop for sizing. A ring she wears on the same finger you plan to fit the engagement ring to gives the most accurate result.

Trace the inside of an existing ring on a piece of paper and bring the paper to the workshop. We can size from the trace within half a size accuracy.

Ask a sister, mother or close friend for an estimate. Family members often know each other’s ring sizes already, particularly if jewellery has been gifted between them.

Make a slightly educated guess and rely on free resizing afterward. We offer free resizing within the first 12 months on every ring we make at our Mt Hawthorn studio, which gives a safety net if the original guess is off.

Free Ring Sizer And In Person Sizing

For Perth clients who want the most accurate measurement before commissioning a bespoke ring, we offer a free ring sizer. The sizer is a small plastic strap with calibrated markings that wraps around the finger and locks in place at the right size, giving a reading directly in Australian sizes. Drop into our Mt Hawthorn workshop and we will size you in person at the bench with our calibrated jeweller’s sizing tools.

In-person sizing remains the most reliable option for engagement rings, wedding bands and any piece where the fit matters. The bench sizing tools we use are calibrated to international standards and account for the width of the band, which affects how a ring fits compared to a sizer.

Ring Resizing After Purchase

Most rings can be resized after purchase, and we offer free resizing within the first 12 months on every ring we make. The standard resizing range is two sizes in either direction without disturbing the design, though heavily set bands (full eternity, full pave) can only be resized within a narrower range.

Resizing typically takes one to two weeks at the workshop bench. The ring band is cut, gold or platinum is added or removed, and the band is re-joined and refinished. The process leaves no visible mark when done well, and the original setting and gemstones are unaffected.

Frequently Asked Questions

What Is The Average Ring Size For Australian Women?

The average sits between L and N (US 6 to 7). Hand size, finger width and knuckle size all shift the actual figure significantly for individual wearers.

How Do I Convert Australian Ring Sizes To US Sizes?

Australian sizes are alphabetical (A through Z); US sizes are numerical. Use the chart above for direct conversion. As a rough rule, the AU letter L equals US size 6, N equals 7, P equals 8, R equals 9, T equals 10.

Can I Get A Free Ring Sizer From Stelios?

Yes. We offer a free ring sizer to clients ordering bespoke rings, available at our Mt Hawthorn workshop. Drop in and we will size you in person, or arrange for a sizer to be sent.

What If My Ring Doesn’t Fit On Engagement Day?

Bring it back to the workshop. We offer free resizing within the first 12 months on every ring we make, with no questions asked. Most rings are resized within one to two weeks of receiving them back at the bench.

Is It Better To Size Up Or Down If I’m Between Sizes?

Generally up, particularly if your knuckles are wider than the base of the finger. A ring slightly loose on the finger is more comfortable than a ring that sits too tight. We always size with comfort allowance at the bench.

Can I Resize An Eternity Or Pavé Band?

Within a narrow range. Full eternity and full pavé bands can only be resized half a size to a full size in either direction, because cutting the band disturbs the diamond setting. We assess each piece individually before resizing.

Get Sized At Our Workshop

The most accurate ring size comes from in-person sizing at the bench, with calibrated tools that match the international standards used worldwide. We invite Perth clients into our Mt Hawthorn workshop for free in-person sizing, or we can post a free ring sizer for clients sizing from elsewhere in Australia