Measure at a Normal Temperature
Fingers can temporarily shrink when cold and swell when warm. Measure when your hands feel comfortably normal.
RING SIZE GUIDE
Find Your Ring Size
A well-fitting ring should pass comfortably over the knuckle and sit securely at the base of the finger. Use the tools below to measure a ring you already own, check your finger circumference, or compare our international size chart.
MEASURE AT HOME
Ring Size Finder
Choose the method that suits you best. For a more reliable result, measure twice and compare your result with the size chart.
01
Calibrate Your Screen
Place a standard credit or debit card against the screen. Move the slider until the on-screen card is exactly the same width as your physical card, then select Set Calibration.
Calibration required before measuring a ring.
MATCH THIS TO A STANDARD PAYMENT CARD
85.60 mm
02
Match the Inside of Your Ring
Place a ring that already fits the intended finger flat against the screen. Adjust the circle until its edge matches the inside edge of your ring.
ALIGN TO THE INNER EDGE OF YOUR RING
01
Measure Around Your Finger
Wrap a narrow strip of paper or non-stretch string around the base of the finger. Mark where the ends meet, then measure that length in millimetres with a ruler.
Measure snugly, but not tightly. Make sure the size can still
pass comfortably over your knuckle.
mm
01
Measure the Inner Diameter
Place a well-fitting ring on a ruler and measure straight across the widest part of the inside opening. Do not include the metal band in the measurement.
Measure in millimetres for the most useful result.
mm
YOUR CLOSEST SIZE
US
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UK
—
EUROPE
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CHINA / JAPAN
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CIRCUMFERENCE
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INNER DIAMETER
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This is a sizing estimate. If your measurement sits between two sizes, or you are choosing a wide band, contact us before ordering.
BEFORE YOU MEASURE
Measure for a Better Fit
Measure More Than Once
Check your size at different times of day. If your measurements repeatedly fall between sizes, the larger size is usually more comfortable.
Consider the Band Width
Wider bands generally feel more snug than delicate bands. Allow a little extra room when choosing a broad wedding band.
Check the Knuckle
Your ring needs to pass over the knuckle while still sitting securely at the base of the finger.
INTERNATIONAL CONVERSION
Ring Size Chart
Use the same conversion chart used across Ecophilia. If your measurement falls between two rows, choose the more comfortable fit and consider band width.
| Finger Circumf. (mm) | US | UK | Europe | China, Japan |
|---|
KEEPING IT A SURPRISE?
Finding a Ring Size for Someone Else
Borrow a Ring
Choose a ring they already wear on the same finger and use our digital ring sizer or measure its inner diameter.
Ask Someone They Trust
A close friend or family member may already know their size or can discreetly help you find out.
When in Doubt
If you're choosing between two sizes, the larger size is generally the safer option for comfort. Contact us if you would like guidance before placing the order.
IMPORTANT TO KNOW
Check Before Your Piece Is Made
Some personalised and stone-set ring designs have limited resizing options. If you are unsure of the size, we recommend confirming it before your piece is made.
ASK US ABOUT SIZINGRING SIZE FAQ
Good to Know
What is the best way to find my ring size?
If you already own a ring that fits the intended finger well,
measuring its inner diameter is usually a convenient starting point.
You can also use the calibrated digital ring sizer above or have your
finger professionally measured by a jeweler.
What should I do if I am between two sizes?
A slightly larger size is generally more comfortable than a size that
is too tight. Band width and knuckle size also matter, so contact us
if your measurement falls directly between sizes.
Do wide rings fit differently?
Yes. Wider bands tend to feel tighter because more metal is in contact
with the finger. You may need slightly more room than with a thin band.
Can I use a ring worn on another finger?
Ring size can vary between fingers and between hands. For the best
estimate, use a ring that is already worn on the exact finger intended
for the new ring.
Can all Eco & Co rings be resized?
Resizing depends on the design, setting and amount of change required.
Full eternity bands and some intricate stone-set designs may have
limited resizing options. Contact us before ordering if sizing is uncertain.
Is the digital ring sizer exact?
It provides an estimate based on your screen calibration and measurement.
Browser zoom, display scaling and how the ring is positioned can affect
the result. Measure more than once and use the size chart as a second check.