Press

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

Royal Coster
Diamonds Size

MM / INCH (Circumference)

48 / 1.89

49 / 1.93

50 / 1.97

51 / 2.01

52 / 2.05

53 / 2.09

54 / 2.13

55 / 2.17

56 / 2.20

57 / 2.24

58 / 2.28

59 / 2.31

60 / 2.36

Discover your ring 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. 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.

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.

Get in Touch

Our press team loves working with journalists around the world to share compelling, unique stories. If you’re a member of the media and would like to talk, please get in touch with the appropriate team or send an email to press@royalcoster.com.

Only media inquiries will receive a response.

Royal Coster Diamonds

Paulus Potterstraat 2

1071 CZ Amsterdam, The Netherlands

Open from Monday - Sunday: 09:00 - 17:00

Phone Number: (+31) 20 305 5555

ROYAL COSTER DIAMONDS

AT THE HEART OF IT. SINCE 1840.

The world’s oldest and most trusted diamond factory has a rich and compelling history. Royal Coster Diamonds is around for a long time, dating back all the way to at least 1840.

Facts & Figures ☷ (.docx)

Our Craft

The art of cutting diamonds

At Royal Coster we take pride in our craft. We handpolish all jewels in-house before they receive our trademark Crown. Read how more about our trade.

Assets (.zip)

SIGNATURE CUT

About the Royal 201

Learn about our unqiue and signature cut, the Royal 201 Diamond

Facts & History ☷ (.doc)

Assets ☷ (.zip)

EXHIBITION

AN ODE TO PERFECTION

Experience the perfect combination of modern technology, creativity and craftsmanship during this exhibition.

Official Press Release

Assets ☷ (.zip)

SIGNATURE

SIGNATURE C COLLECTION

Use these sections to promote a particular feature with editorial photography.

Facts & Figures ☷ (.docx)

Assets ☷ (.zip)

Recent News

View all news

Royal Coster Diamonds gaat het Open Startbaan Toernooi 2023 extra glans geven.

Jun 15, 2023

Dit jaar mogen we ons de officiële hoofdsponsor noemen van het...

Officieel sponsor ARTZUID 2023

May 15, 2023

Als van oorsprong Amsterdams diamanthuis sponsoren we vol trots de achtste editie van de tweejaarlijkse beeldententoonstelling ARTZUID. Deze editie vindt plaats van 20 mei tot en met 24 september 2023...

‘An Ode to Perfection’ exposition

Nov 16, 2022

'An ode to Perfection' expositieDe expositie ‘An Ode to Perfection’ neemt je mee in de wereld van diamant en slijpvorm. Centraal staat de Royal Coster 201: ‘the perfect balance’. Een...

Precautions Regarding the Coronavirus

Sep 2, 2020

COVID-19 has the world in its grip. We are now trying to find our way from an "intelligent lockdown" into the "New Normal". This also applies to Royal Coster Diamonds....

Your location is set to United States

Change language

Your cart

Your cart is empty

Find Your Ring Size

Discover your ring size

Still not sure about your size?

Your Enquiry

Your Enquiry

DROP A HINT

Sender

Recipient

Press

Get in Touch

AT THE HEART OF IT. SINCE 1840.

The art of cutting diamonds

At Royal Coster we take pride in our craft. We handpolish all jewels in-house before they receive our trademark Crown. Read how more about our trade.

About the Royal 201

Learn about our unqiue and signature cut, the Royal 201 Diamond

AN ODE TO PERFECTION

Experience the perfect combination of modern technology, creativity and craftsmanship during this exhibition.

SIGNATURE C COLLECTION

Use these sections to promote a particular feature with editorial photography.

Recent News

Royal Coster Diamonds gaat het Open Startbaan Toernooi 2023 extra glans geven.

Officieel sponsor ARTZUID 2023

‘An Ode to Perfection’ exposition

Precautions Regarding the Coronavirus

Availability