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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

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162 Results

Master Collection Automatic 40Mm Silver Dial - Royal Coster Diamonds
Master Collection Automatic 40mm - Royal Coster Diamonds
Sale

Master Collection Automatic 40Mm Silver Dial

Longines

Regular price € 2.700 € 2.160

Unit price
per 

Hydroconquest Automatic 41Mm Sunray Blue Dial

Longines

€ 2.000

Unit price
per 

Conquest Quartz 29.5 Mm Sunray blue Dial - Royal Coster Diamonds
Sale

Conquest Quartz 29.5 Mm Sunray blue Dial

Longines

Regular price € 1.280 € 1.024

Unit price
per 

True Automatic 40Mm Black Dial

Rado

€ 1.950

Unit price
per 

Miss Lovely Automatic 33.5Mm Purple Dial - Royal Coster Diamonds
Sale

Miss Lovely Automatic 33.5Mm Purple Dial

TITONI

Regular price € 1.100 € 880

Unit price
per 

Star Legacy Automatic 39mm - Royal Coster Diamonds
Sale

Star Legacy Automatic 39Mm

Montblanc

Regular price € 2.630 € 2.104

Unit price
per 

1858 Automatic 40mm - Royal Coster Diamonds
1858 Automatic 40mm - Royal Coster Diamonds
Sale

1858 Automatic 40Mm

Montblanc

Regular price € 2.930 € 2.344

Unit price
per 

Hydroconquest Ceramic 41 Mm Grey Dial

Longines

€ 2.000

Unit price
per 

Hydroconquest Automatic 39Mm Blue Dial

Longines

€ 2.000

Unit price
per 

Spirit Automatic Chronometer 37Mm Silver Dial

Longines

€ 2.450

Unit price
per 

Highlife Automatic Cosc 41Mm

Frederique Constant

€ 1.895

Unit price
per 

Slimline Moonphase 30Mm - Royal Coster Diamonds
Sale

Slimline Moonphase 30Mm

Frederique Constant

Regular price € 725 € 580

Unit price
per 

Spirit Chronograph Automatic 42Mm Black Matt Dial

Longines

€ 3.600

Unit price
per 

Carrera Automatic Chronograph 45Mm Black Dial - Royal Coster Diamonds
Carrera Automatic Chronograph 45mm - Royal Coster Diamonds
Sale

Carrera Automatic Chronograph 45Mm Black Dial

TAG Heuer

Regular price € 7.000 € 5.600

Unit price
per 

Khaki Aviation Day Date Automatic 42Mm Black Dial

Hamilton

€ 1.145

Unit price
per 

Possession Quartz 34Mm Silver Dial - Royal Coster Diamonds
Possession Quartz 34mm - Royal Coster Diamonds
Sale

Possession Quartz 34Mm Silver Dial

Piaget

Regular price € 20.100 € 16.080

Unit price
per 

Aquaracer Professional Automatic 43Mm Black Dial - Royal Coster Diamonds
Aquaracer Professional Automatic 43mm - Royal Coster Diamonds
Sale

Aquaracer Professional Automatic 43Mm Black Dial

TAG Heuer

Regular price € 3.450 € 2.760

Unit price
per 

Highlife Heart Beat 41Mm

Frederique Constant

€ 1.950

Unit price
per 

Presence Automatic 25.5Mm White Dial - Royal Coster Diamonds
Sale

Presence Automatic 25.5Mm White Dial

Longines

Regular price € 1.120 € 896

Unit price
per 

Ceramica Diamonds 22.9Mm Black Dial - Royal Coster Diamonds
Sale

Ceramica Diamonds 22.9Mm Black Dial

Rado

Regular price € 2.800 € 2.240

Unit price
per 

Integral Diamonds 22.7Mm Black Dial

Rado

€ 2.500

Unit price
per 

Integral Quartz 31Mm Black Dial

Rado

€ 2.300

Unit price
per 

True Diamonds 30Mm Grey Dial

Rado

€ 2.210

Unit price
per 

True Secret 40Mm Black Dial

Rado

€ 2.300

Unit price
per 

Find your Signature ring

The Signature rings collection brings together the best rings from all of our signature collections. Whether it’s the bright colors of the Rainbow collection, the stylish Nikkie collection, the famous Royal 201 Signature C collection, the timeless Coster Classic collection, or the romantic rings from our Engagement and Wedding collection, every ring is chosen for its stunning look and fine quality.

This special collection is the very best we have. It includes many different designs, all made with the finest care and luxury in mind. Skilled craftsmen make each ring by hand, picking diamonds that shine and sparkle brightly. These signature rings show the top quality that we offer more than 180 years.

The Signature rings collection is perfect for someone who wants a ring that stands out. With everything from rings with many colors to simple and elegant designs, this collection lets you find the perfect ring that fits your own style and tells your personal story.

Get your dream ring

Whether you’ve set your eyes on an a wedding ring or a rainbow ring, we have what you’re looking for. We have many different ring settings. We can make one exactly how you want it and with the kind of diamonds you want. Contact us to find your dream rings.