I use UK Ring sizes.​

 

Wrap a strip of paper/string around your finger or knuckle. Hold snug and mark where it overlaps, unwrap & and measure its length.

I recommend picking the larger measurement even if it's the knuckle, otherwise you may struggle to put the ring on.

Then see the Chart for which letter the circumference corresponds to.

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Or: measure the diameter of a ring you wear / you’ve seen them wear and multiply by 3.14 (π) = circumference (then see Chart).

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Or: Ask a jewellery store to measure for you! Many will kindly do this.

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A note on half-sizes: Some fingers can fit comfortably a couple of different size letters without any risk of the ring falling off or moving around.

I measure all rings on the measuring mandrel and include the half-sizes in my products when applicable. The differences between each letter size are about one millimetre and therefore half-sizes are not always necessary when measuring you own fingers, but I am sure you can gauge from the chart based on your measurements!

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