Ring Size Guide – Find the Right Size in 2 Minutes

Buying a ring online should feel safe. With this guide you can measure your ring size at home – all you need is a piece of string or a strip of paper. And if it still isn't right? Don't worry, you can always return it.

How to measure – three simple steps

1. Wrap a string or a strip of paper around your finger where the ring will sit. 2. Mark where the ends meet. 3. Measure against a ruler – the length in millimetres is your finger circumference.

Three steps for measuring your ring size at home: a string wrapped around the finger, the meeting point marked, and the string measured against a ruler.
A ring seen from above resting on a ruler, with the inner diameter marked in orange – the inside is measured, not the outside.

Already have a ring that fits?

The fastest method of all: place the ring on a ruler and measure the inner diameter in millimetres. That measurement is your size – our sizes are simply the inner diameter.

Size chart

Our ring sizes are stated as the inner diameter in millimetres – size 17 means 17 mm across the inside. Find your circumference in the table and read off your size, and the equivalent US, UK and EU size.

Circumference Inner diameter Timi size US UK EU
50 mm 16.0 mm 16 5½ K½ 50
53 mm 17.0 mm 17 6½ N 53
55 mm 17.5 mm 17.5 7¼ O 55
57 mm 18.0 mm 18 8 P½ 57
60 mm 19.0 mm 19 9 R½ 60
63 mm 20.0 mm 20 10¼ T½ 63
66 mm 21.0 mm 21 11½ V½ 66

The US and UK systems use different steps than millimetres, so those columns are the closest equivalent – the millimetre measurement is always the exact one. Between two sizes? Go up – a ring that is slightly loose is far more comfortable than one that is slightly tight. The size of each ring is stated in its product description.

Tip! Measure in the evening

Fingers change size during the day – measure in the evening, on the exact finger the ring will sit on, at normal room temperature.

Adjustable rings – when you want full flexibility

Many of our rings are adjustable and fit almost every hand – perfect when the ring is a gift and you cannot ask for a size. See all adjustable rings or browse every ring here.