📏 Not sure what your ring size is?

Sizing can feel confusing  different jewellers use different systems, and no two charts are exactly alike. That’s why I size everything in millimetres (mm) for accuracy. Here are two easy ways to measure at home:

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Option 1: Paper strip method

• Cut a strip of paper about 10cm long, 1cm wide.
• Wrap it around your finger where the ring will sit.
• Mark where the ends meet (not too tight, not too loose).
• Lay it flat and measure the length in mm this is your finger’s circumference.
• Match it to the chart below.

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Option 2: Use a ring you already own

• Grab a ring that fits the finger you want sized.
• Place it flat on a ruler.
• Measure straight across the inside (the inner diameter in mm).
• Match it to the chart below.

Larl Wonders Jewellery Ring Chart 

UK Size	Inner Diameter (mm)
J	15.6
K	16.0
L	16.4
M	16.8
N	17.1
O	17.6
P	18.0
Q	18.4
R	18.9
S	19.3
T	19.6
U	20.0

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Important to know

• Weather & time: Fingers swell in heat and shrink in cold. They’re usually bigger in the evening.
• Dominant hand: Your writing hand is often slightly larger.
• Band width: Wide bands (7mm+) feel tighter — size up about half a size for comfort.
• Normal variation: Don’t worry if you get slightly different results each time — it happens.
• 💡 When in doubt, size up for a more comfortable fit.