Ring Size Guide
Whether you're selecting a ring for yourself or a loved one, this guide will assist you in finding the perfect fit.
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If you're in Melbourne, we recommend visiting the Black Finch showroom to be professionally sized.
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RING SIZER TOOL
The most reliable way to size from home. Request a complimentary sizer when purchasing a Black Finch ring, or order a sizer now via the link below.
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measure an existing ring
Have a ring that fits the intended finger? Measure the internal diameter (mm), then refer to our size conversion chart below to find the match. Alternatively, wrap a thin string around the finger, mark where it overlaps, then measure the length.
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Buy now, size later
If you want to keep it a surprise, we recommend purchasing based on standard sizing. Black Finch offers a complimentary resize after purchase.
Small - Size K
Medium - Size N
Large - Size Q
further Considerations
Here are a few expert tips to keep in mind when determining your ring size:
Timing is key
Your fingers can change size throughout the day (and the year). Body temperature, climate, even salt intake can affect how snug or loose a ring feels. Measure your finger in the evening at room temperature, when your body is relaxed.
Band width
Wider bands (3mm or more) will feel firmer on the finger and may require you to go up half a size or more.
Resizing and limitations
We offer one complimentary resize on all Black Finch rings and offer subsequent resizing services for a fee.
If your resize requires a big jump (up or down), we may need to remake the ring to maintain its structural integrity.
Keeping in mind the cost of material, many of our solid bands and signets have price variables dependant on size. For those requiring a size above Q, we ask that you get in contact with a consultant for a personalised quote-we’ll be happy to provide pricing and production timelines tailored to your desired size.
Frequently Asked Questions
Yes, you can accurately find your ring size at home by using methods like a ring sizer tool, measuring an existing ring, or the string/paper method, you can get a reliable size. Double-check across different times of day to account for finger fluctuations.
Use our ring size chart where K-N-Q correspond roughly to 51–68mm circumference. We include international conversions for clarity.
Yes, we suggest going up in sizing for wide bands. Wider rings (≥3–5mm) fit tighter across the finger. For 5mm+ bands, consider sizing up ¼ size; for 7mm+, up to ½ size.
You can estimate based on a partner’s existing ring or ask a trusted friend.
Your finger size can change over time. Factors like weight, pregnancy, temperature, alcohol consumption or even a salty meal can affect your finger size. If your size fluctuates seasonally, you may wear the ring on a pendant chain temporarily.
There are a few simple ways to calculate your ring size at home. You can wrap a strip of paper or string snugly around the base of your finger, mark where it overlaps, then measure the length in millimetres and match it to a ring size chart. Or, if you already have a ring that fits well, you can measure its internal diameter and compare that to our guide. For the most accurate fit, especially for wider bands, we recommend using a physical ring sizer.
Yes, there are mobile apps that claim to help you find your ring size using your phone camera or screen. They can be a handy starting point, especially when measuring an existing ring. However, they’re not always perfectly accurate. For peace of mind (and a better fit), we suggest double-checking with a ring sizer or visiting our Melbourne studio.
The best way to find your engagement ring size is to measure your finger at the end of the day, when it’s at its largest (fingers tend to shrink slightly in the cold). You can use a physical ring sizer, a printable chart, or measure the inside diameter of a ring that already fits that finger well. If the ring is a surprise, see if a friend or partner can discreetly borrow one of their rings, or we can help you choose a safe ‘average’ size with room to resize later if needed.
Your wedding ring should fit snugly but comfortably, firm enough that it won’t slide off, but loose enough to slide over your knuckle without force. Keep in mind that wider bands often feel tighter, so you may need to size up slightly for a perfect fit.
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