Getting the perfect engagement ring is thrilling, but there's one little detail that can make even the most confident planner sweat, finding the right ring size. Too snug and it's uncomfortable, too loose and it could slip off.
Whether you're treating yourself or planning a surprise proposal, knowing your size is an important detail to address before you part with a lot of money. Don't stress. We've put this simple guide together to help you figure it out with ease.
Using The Stuff You Already Have at Home
You don't actually have to dash to a jeweller. Most of the time, you've already got exactly what you need lying around the house. All you need is something to wrap around your finger, a way to measure it, and something to mark it.
Some string or dental floss works perfectly, anything that can snugly go around your finger. Grab a ruler with millimetres if you have one, though centimetres will do if you don't. You should also have a pen or marker handy to keep track of the measurements. If the string or paper slips while you're marking, a little piece of tape can help keep it steady. With these simple tools, you've basically got your own DIY ring-sizing kit.
Here's the simple trick:
- Lightly wrap your string or paper around the base of your finger where the ring will sit
- Mark where the ends meet. If it slides around, tape it lightly so it stays in place
- Measure the length from the start to your mark. That's your finger's circumference
- Divide that number by 3.14 (π) to get the diameter
- Compare your number to a ring size chart to find your size
For example, 16.5mm in diameter is roughly an Australian size N.
Understanding Ring Sizes in Australia
In Australia, ring sizes are worked out using letters from A to Z, and they even include half sizes to make sure your ring fits correctly. If you find it easier to work with centimetres instead of millimetres, it's simple to convert:
- 1 cm = 10 mm
- So, a finger diameter of 16.5 mm is the same as 1.65 cm, which is an Australian size N
Knowing your Australian ring size is helpful whether you're shopping nearby or online. If you're buying from overseas, you'll need to convert Australian ring size to US. For example:
- Australian size N = US size 6.5
- Australian size P = US size 7.5
Using a ring size chart makes it easy to check conversions and avoid any guesswork.
Tech to the Rescue: Apps & Online Tools
For those who prefer to use tech, there are multiple options available. Many jewellers offer ring size calculators on their websites. You enter your measurements, and the tool instantly tells you your size.
Alternatively, you can use a ring size app on your phone. These apps allow you to place an existing ring on your screen or use augmented reality to measure your finger.
Ring Sizer Tools
If you want the most precise measurement possible, try a ring sizer tool. It's basically a set of plastic rings that slide over your finger, showing your exact size. Most jewellers, including online stores, provide free ring sizers that you can order and keep. Using one ensures that your ring will fit perfectly without guessing and risking getting the wrong result.
Quick Tips On How to Find Engagement Ring Size Australia
- Do the measurements at the end of the day because fingers tend to swell in the morning, so the sizing will be more accurate later on
- Between two sizes? Pick the bigger one. It's easier to size a ring down than up
- Double-check with another method (string, app or sizer) so you're not relying on just one guess
Finding the right engagement ring size doesn't need to be stressful. With a ring size chart, ring size calculator, or a simple DIY method at home, you can get the perfect fit. At Vinny & Charles, we love helping our clients make this process easy and even a little fun, so your engagement ring fits just right, and the proposal goes off without a hitch.

