Lifetime free cleaning and polishing service.

Free insured shipping in Europe.

Your cart

Your cart is empty

Bekijk deze collecties.

Find Your Ring Size

Royal Coster
Diamonds Size
MM / INCH (Circumference)
48 / 1.89 48 4½ 8
49 / 1.93 49 9
50 / 1.97 50 K 10
51 / 2.01 51 L 11
52 / 2.05 52 6 12
53 / 2.09 53 13
54 / 2.13 54 14
55 / 2.17 55 O 15
56 / 2.20 56 P 16
57 / 2.24 57 8 17
58 / 2.28 58 18
59 / 2.31 59 R 19
60 / 2.36 60 9 S 20

Discover your ring size

Measure an existing ring Measure your finger

Your Enquiry

Your Enquiry

DROP A HINT

Sender

Recipient

  • How To Take Care of Your Watch - Royal Coster Diamonds

    How To Take Care of Your Watch

    Know your watch’s water resistance 3 ATM / 30m: Splash proof and waterproof in small amounts of water. 5 ATM / 50m: Can be submerged in water. Suitable for shallow...

    Read more
  • Do I need a Watch Winder - Royal Coster Diamonds

    Do I need a Watch Winder

    Let me start by saying nobody really needs a watch winder, ever. You didn't even need an automatic watch to begin with. In fact, in this day and age, you...

    Read more
  • Why watches are always 10 past 10 - Royal Coster Diamonds

    Why watches are always 10 past 10

    Timepieces come in all sorts and shapes. Just think for example about the differences between analog watches and wall clocks. In addition, there are all kinds of variations within those...

    Read more