Find your ring size

How to find your ring size at home. We then measure it precisely in our shop on Wengengasse, free of charge and in two minutes.

Ring size calculator

Enter the circumference or the inner diameter in millimetres. Your size appears instantly.

Inner circumference or paper stripmm

Your ring size

Enter a value in millimetres and your size appears here.

In the shop we check it precisely with our ring gauge, free of charge and without an appointment.

The German ring size is the inner circumference of the ring in millimetres. Size 54 means 54 mm all the way round on the inside.

With a ring that fits
Place a well fitting ring on a ruler and measure the inner diameter from edge to edge. Enter the value in the calculator under “Diameter”.
With a strip of paper
Wrap a narrow strip of paper snugly, but not too tight, around the widest part of your finger. Mark where it overlaps and measure the length up to the mark. That is your circumference.
In our shop
Our ring gauge in the shop is the most accurate. Just drop by, no appointment needed. For wedding rings we measure both partners.
Getting it right
Measure in the evening: fingers are slightly thicker than in the morning and thinner when cold. The ring has to slide over the knuckle. If your knuckle is wide, choose the larger size. Wide rings from about 6 mm feel tighter: go one size up. If you are between two sizes, choose the larger one.

Ring size, inner circumference and inner diameter at a glance.

The size equals the inner circumference in millimetres.

Print the template and place a ring that fits on the circles. The circle that fits exactly inside the ring is your size.

In the print dialog choose “Actual size” or 100 %, not “Fit to page”. The number under each circle is the ring size.

Mein Juwelier Ulm · ring sizer

Preview. What prints is an A4 sheet with all sizes from 44 to 72, a 10 cm control ruler and a measuring strip to cut out.