Ring Size Chart

Once you've chosen your preferred ring design, it's crucial to determine the ring size that will fit your finger comfortably. Below, we present a ring conversion table and 3 methods for discreetly measuring ring size.

Rings of different sizes: Size 6, 15 and 23.
Note: Rings not illustrated to scale.

Ring Size Conversion Table

Inter-Diameter (mm) HK Size US Size UK Size JP Size CH Size
14.1 6 3 F 4 4
14.3 7 3.25 F 1/2 5 5.25
14.7 8 3.75 G 6 6.5
14.9 9 4 H 7 7
15.3 10 4.5 I 8 8.5
15.7 11 5 J 1/2 9 9.5
16.1 12 5.5 K 1/2 10 10.5
16.5 13 6 L 1/2 11 12.75
16.7 14 6.25 M 12 13.5
17.1 15 6.75 N 13.5 14.5
17.3 16 7 N 1/2 14 15.25
17.7 17 7.5 O 1/2 15 16.5
18.2 18 8 P 1/2 16.25 18.25
18.5 19 8.5 Q 1/2 17 18.75
18.8 20 9.75 R 17.5 19
19.1 21 9.25 S 18 20
19.4 22 9.5 S 1/2 19 20.75
19.8 23 10 T 1/2 20 21.75
20.2 24 10.5 U 1/2 22 22.75
20.6 25 11 V 1/2 23 24.75
21.0 26 11.5 W 1/2 24 26.25
21.2 27 12 X 24.5 26.75
21.6 28 12.25 Y 25.5 28
22.0 29 12.5 Z 1/2 26.5 29

How to Measure a Ring in Secret

Purchasing an engagement ring or a surprise present for your significant other? Below are our top recommendations for discreetly determining their ring size.


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We highly recommend booking a personal viewing appointment for the best experience. Seeing and testing our diamonds in person allows you to truly appreciate their beauty and ensures the perfect fit.

When scheduling your visit, please share your preferences and budget with us. We are dedicated to providing tailored recommendations and are eager to assist you in selecting the ideal gift.

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