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Royal Coster Diamonds Size	MM / INCH (Circumference)
	48 / 1.89	48 4½ I½ 8
	49 / 1.93	49 4¾ J¾ 9
	50 / 1.97	50 5½ K 10
	51 / 2.01	51 5¾ L 11
	52 / 2.05	52 6 L½ 12
	53 / 2.09	53 6¼ M½ 13
	54 / 2.13	54 6¾ N½ 14
	55 / 2.17	55 7¼ O 15
	56 / 2.20	56 7½ P 16
	57 / 2.24	57 8 P½ 17
	58 / 2.28	58 8¼ Q½ 18
	59 / 2.31	59 8¾ R 19
	60 / 2.36	60 9 S 20

Discover your ring size
Measure an existing ring	Measure your finger
1. Download the pdf document below, set it to 100% and print it on A4 paper. You can measure the 5cm line to check the accuracy of the printed dimensions. 2. Check which circle matches the size of your ring. Make sure that the black circle is only visible within the ring. 3. If the ring is in between two circles (sizes), we recommend the larger size.
1. Download the pdf document below, set it to 100% and print it on A4 paper. You can measure the 5cm line to check the accuracy of the printed dimensions. Then, cut out the Finger Sizer. 2. Cut the small gold line. Wrap the sizer around the largest part of your finger and make sure it is tightened. 3. Read your ring size from the sizer. If your ring size is in between two circles (sizes), we recommend the larger size.

Our signature collections

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Signature Rings

Rainbow Double Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Double Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Ring Brilliant Cut Diamond & Sapphire 18K Rose Gold

Royal Coster Diamonds

$2,878.96

Unit price: per

Rainbow Triple Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Triple Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Maxi Ring Brilliant Cut Diamond & Sapphire 18K Rose Gold

Royal Coster Diamonds

$3,688.66

Unit price: per

Royal 201 Signature C 18K Gold Embellished Ring - Royal Coster Diamonds

Royal 201 Signature C 18K Gold Embellished Ring - Royal Coster Diamonds

Signature C Embellished Solitaire Ring Royal 201 Cut Diamond 18K Gold

Royal Coster Diamonds

from $7,152.41

Unit price: per

Royal 201 Signature C 18K Gold Solitaire Ring - Royal Coster Diamonds

Royal 201 Signature C 18K Gold Solitaire Ring - Royal Coster Diamonds

Signature C Solitaire Ring Royal 201 Cut Diamond 18K Gold

Royal Coster Diamonds

from $2,024.26

Unit price: per

Browse all signature rings

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Signature Bracelets

Tennis Expanse Bracelet 18K White Gold (Style 7) - Royal Coster Diamonds

Tennis Expanse Bracelet 18K White Gold (Style 7) - Royal Coster Diamonds

Tennis Expanse Bracelet 18K White Gold

Royal Coster Diamonds

$2,788.98

Unit price: per

MUST-HAVE

Luna Bezel (Multiple) Bracelet 18K Yellow Gold - Royal Coster Diamonds

Luna Bezel (Multiple) Bracelet 18K Yellow Gold - Royal Coster Diamonds

Luna Dangling Bracelet Brilliant Cut Diamond 18K Gold

Royal Coster Diamonds

from $692.74

Unit price: per

Luna Tennis Bezel Bracelet 18K Yellow Gold - Royal Coster Diamonds

Luna Tennis Bezel Bracelet 18K Yellow Gold - Royal Coster Diamonds

Luna Bezel Tennis Bracelet Brilliant Cut Diamond 18K Gold

Royal Coster Diamonds

$4,723.28

Unit price: per

Rainbow Pave Bracelet 18K Rose Gold - Royal Coster Diamonds

Rainbow Pave Bracelet 18K Rose Gold - Royal Coster Diamonds

Rainbow Bangle Brilliant Cut Diamond & Sapphire 18K Rose Gold

Royal Coster Diamonds

$5,532.99

Unit price: per

Browse all signature bracelets

Signature Earrings

Rainbow Single Big Pave Earrings 18K Rose Gold - Royal Coster Diamonds

Rainbow Hoop Earrings Brilliant Cut Diamond & Sapphire 18K Rose Gold

Royal Coster Diamonds

$2,249.19

Unit price: per

Miriam 18K Gold Floral Earrings - Royal Coster Diamonds

Miriam 18K Gold Floral Earrings - Royal Coster Diamonds

Miriam Floral Earrings 18K Gold (small)

Royal Coster Diamonds

Regular price ~~$1,259.54~~ from $1,070.61

Unit price: per

MUST-HAVE

Rainbow Single Small Pave Earrings 18K Rose Gold - Royal Coster Diamonds

Rainbow Hoop Huggie Earrings Brilliant Cut Diamond & Sapphire 18K Rose Gold

Royal Coster Diamonds

$2,069.25

Unit price: per

Luna Bezel Solitaire Huggie Earrings Brilliant Cut Diamond 18K White Gold

Royal Coster Diamonds

from $1,259.54

Unit price: per

Signature Necklaces

Nikkie White Gold Solitaire Stud Necklace - Royal Coster Diamonds

Nikkie White Gold Solitaire Stud Necklace - Royal Coster Diamonds

Nikkie Solitaire Necklace Brilliant Cut Diamond 18K Yellow Gold

Royal Coster Diamonds

$535.31

Unit price: per

Nikkie Yellow Gold Solitaire Stud Necklace - Royal Coster Diamonds

Nikkie Yellow Gold Solitaire Stud Necklace - Royal Coster Diamonds

Nikkie Solitaire Necklace Brilliant Cut Diamond 18K Yellow Gold

Royal Coster Diamonds

$535.31

Unit price: per

Luna Raindrop Cluster Horizontal Necklace 18K Gold - Royal Coster Diamonds

Luna Raindrop Cluster Horizontal Necklace 18K Gold - Royal Coster Diamonds

Luna Raindrop Necklace Brilliant Cut Diamond 18K Gold

Royal Coster Diamonds

$2,024.26

Unit price: per

Luna Bezel (Multiple) Necklace 18K Yellow Gold - Royal Coster Diamonds

Luna Bezel (Multiple) Necklace 18K Yellow Gold - Royal Coster Diamonds

Luna Dangling Necklace Brilliant Cut Diamond 18K Gold

Royal Coster Diamonds

$809.70

Unit price: per