At the heart of it since 1840.

At the heart of it. Since 1840.

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Why not explore our new Luna Collection?

Find Your Ring Size

Royal Coster
Diamonds Size
Internal Diameter / Circumference (mm)​
14,01
14,33
14,65
14,97
15,21
15,61
15,92
16,24
16,56
16,88
17,20
17,52
17,83
18,15
18,47
18,79
19,11

How To Measure

The Hands-on Method​ Measure an Existing Ring
  • 1. Grab a tape measure, length of string or strip of paper.
  • 2. 2. Wrap one of these objects around your finger. Mark the place where the two end of the measuring object come together.
  • 3. When using string or paper grab a ruler. Lay it on a flat surface and measure to where the marked point is.
  • 4. Use the chart presented above to acquire the correct ring size.

Schedule Appointment

Schedule your consult
In need of some personal advice? We are happy to welcome you and help find you the perfect, personal jewel!
Our diamond experts can assist you in choosing an engagement ring, personalizing a wedding band or selecting a special jewel.
Tell us your wishes as detailed as possible and a diamond consultant will get in touch with you shortly.

7 days a week

Get In Touch

Email, chat or call to consult us on your next purchase.

VISIT US

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Visit your favorite items at our Flagship location in Amsterdam.