Size chart

Two ways to determine your ring size

Do you already have a ring that fits well? You can measure that. If not, measure your finger instead.

Method 1: Measure your finger

Cut a piece of paper or string to about 10 cm (approx. 4 inches).

Wrap it around the finger where you want to wear the ring. Make sure it fits comfortably (not too tight, not too loose).

Mark the point where the paper or string overlaps.

- Lay it flat against a ruler and measure the length in millimeters (mm).

- This is the circumference in millimeter (mm) of your finger. Check our ring size chart above to convert this measurement to your correct size.


Method 2: Measure a ring

- Choose a ring that fits comfortably on the desired finger. (Our rings are mostly worn on the index finger, making it easy to spin with your thumb!)

- Place the ring on a ruler and measure the inside (diameter) of the ring in millimeters (mm) or inches.

- Check our ring size chart above here to convert this measurement to the correct ring size.

- This is the diameter ⌀ in millimeters (mm) of your ring.

Click here for our adjustable fidget rings


Feel the Calm

Break the skin picking cycle

Stop the urge before it starts. One gentle spin redirects your hands and replaces the habit, giving your skin the peace it needs to heal.

Frequently Asked Questions

Do kids fit these jewelry pieces?

Yes, this ring is specially designed for children and is fully adjustable.

The ring can be adjusted from 12.4 mm to 15.0 mm, making it suitable for children aged approximately 5 to 10 years.

Note: Not suitable for children under 4 years due to choking hazard. Always allow children to wear the jewelry under supervision.
Not intended as a toy. Do not wear jewelry while sleeping.

Yes, our Jewellery is specially designed to keep your hands busy by spinning it.

They help distract your thoughts and reduce the urge to bite your nails or pick at your skin.

Are you unsure about your size? Click here for our simple instructions.


All you need is a piece of string, a strip of paper, or another ring that fits well!

Yes, orders dispatch directly from our warehouse in the Netherlands with tracking. Free shipping on orders above €50.

the Netherlands: Next-day delivery (order before 23:00).
Belgium & Germany: 1-2 business days.
Rest of EU & UK: 3-6 business days.

Yes, you can easily exchange your order within 30 days of receipt or return it within 14 days of receipt.

Send an email to info@luminora.nl to start your return.

Our collections

  • /
  • /
  • /