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Find Your Ring Size

Royal Coster
Diamonds Size
Internal Diameter / Circumference (mm)​

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.

De Royal Coster Diamonds winactie

Win een diamant!

Wil je een diamant winnen? Om Valentijnsdag goed te vieren verloten wij een briljant geslepen diamant van 0.30 karaat met een waarde van €900!

Doe mee aan de give away en maak kans om te winnen. Daarnaast kan de gelukkige winnaar kiezen uit een complementaire ring- of hangerzetting en kan toekijken hoe onze goudsmeden een prachtig sieraad maken.

Doe mee met onderstaande give away voor het ultieme Valentijnscadeau!


Give-Away Terms and Conditions

  • The diamond give-away (hereinafter referred to as the “Give-Away”) is open only to individuals who are 18 years of age or older.
  • No purchase or payment is necessary to enter or to win the Give-Away.
  • The Give-Away begins on the date of announcement and ends at 12:00 pm CET on February 3rd 2023.
  • The winner of the Give-Away will be chosen at random.
  • The winner will be notified via email within 48 hours of the closing of the Give-Away.
  • The winner must respond within 48 hours of being notified of their win. If the winner does not respond within 48 hours, they will forfeit their prize and a new winner will be chosen.
  • The prize is non-transferable, non-exchangeable and no cash alternative will be offered.
  • The winner may be required to provide proof of identity and age.
  • The Give-Away is subject to Dutch law and is void where prohibited.
  • The decision of the Give-Away organizer is final and no correspondence will be entered into.
  • By participating in the Give-Away, entrants agree to be bound by these terms and conditions.