Ring sizing guides
How to measure your ring size at home
Five ways to measure ring size at home, ranked by accuracy, plus the calibration step that decides whether any of them actually works.
Read the guideGuideRing size chart for US, UK, EU, Japan, China and Russia
The complete international ring size chart with millimetre diameters and circumferences, plus how to read it and which column your seller actually means.
Read the guideGuideRing size converter
Convert ring sizes between US, UK, EU/ISO, Japanese, Chinese and Russian systems instantly, plus the millimetre diameter every jeweller can work from.
Read the guideGuideHow to measure ring size without a ring sizer
The string and paper methods explained properly, including the error each one introduces and the fix that makes a phone screen more accurate than either.
Read the guideGuideHow to find her ring size without her knowing
Eight ways to get an engagement ring size secretly, ranked by how accurate and how risky each one is, plus what to order when you still are not sure.
Read the guideGuideHow to measure ring size using a ring you already own
The most accurate at-home method: measure the inner diameter of a ring that fits. Here is how to do it on screen, on paper, and with a caliper.
Read the guideGuideHow to measure your finger for a ring size
Measure a finger accurately when you have no ring to copy: the on-screen gauge method, the knuckle test, and when to take the reading.
Read the guideGuideVirtual ring try-on: see a ring on your own hand
How AI virtual try-on works, what it can and cannot tell you about a ring, and how to shoot a hand photo that produces a genuinely useful preview.
Read the guideGuideAverage ring size for women and men
The most common ring sizes for women and men, what the distribution looks like, and how to use an average safely when you cannot measure.
Read the guideGuidemm to ring size: diameter and circumference converted
Turn a millimetre measurement into a ring size. Full diameter and circumference chart, plus how to tell which of the two your number actually is.
Read the guideGuidePrintable ring sizers, and why they so often print wrong
How to use a printable ring sizer without the scaling error that ruins most of them, plus the credit-card check that verifies any printed or on-screen scale.
Read the guideGuideMen’s ring size chart and how to measure
The men’s ring size chart from US 8 to 13 with millimetres, why men’s bands usually need a size up, and how to measure a man’s finger properly.
Read the guideGuideWide band ring sizing: when to size up, and by how much
Wide bands fit tighter at the same size. Here is the adjustment table by band width, why it happens, and how comfort fit changes the answer.
Read the guideGuideRing sizing when your knuckle is bigger than your finger
Measure both the knuckle and the base, pick a size between the two, and stop the ring spinning. The complete fix for large-knuckle ring sizing.
Read the guideGuideEngagement ring size guide
How to get an engagement ring size right when you only get one attempt: secret measuring, what to order if you cannot, and the resize questions to ask first.
Read the guideGuideUS to UK ring size conversion
Convert US ring size numbers to UK letters and back. Full chart from US 3 to 13, plus the half-letter rule that trips most conversions up.
Read the guide