Find your size in 30 seconds

Two simple ways to measure at home, using things you already have.

Method 1 - String or paper strip

  1. Wrap a strip of paper or string around the base of the finger you'll wear the ring on. Mark the point where it overlaps.
  2. Lay it flat and measure the length in millimetres.
  3. Match your measurement to the Circumference column in the size chart below.

Method 2 - An existing ring you already own

  1. Take a ring that already fits the intended finger well.
  2. Measure the inner diameter (straight across the inside, not around the outside) with a ruler.
  3. Match your measurement to the Diameter column in the size chart below.
Ring Size Circumference Diameter
7 54.4mm 17.3mm
8 56.9mm 18.1mm
9 59.5mm 18.9mm
10 62.1mm 19.8mm
11 64.6mm 20.6mm
12 67.2mm 21.4mm
13 69.8mm 22.2mm

Measure at the end of the day.


Fingers swell slightly later in the day, so measuring then gives a more reliable everyday fit.

Avoid measuring in the cold.


Cold temperatures make fingers shrink, so measure at a normal room temperature for an accurate result.

Fits snug by design


The ring needs steady skin contact for proper readings, so if you're between sizes, choose the slightly larger one.

Ready to find your fit?

Shop the Rivva ring