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Ring Size Guide

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Last Updated: January 07, 2026

 

At Beldad Jewelry, we ensure that every 18k gold piece is cast to provide a perfect and comfortable fit. Finding your correct size is essential for the longevity of your ring and the security of its setting.

 

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1. How to Measure Your Size

For the most accurate results, our team recommends the following methods to determine your ring size at home:

  • Measure an Existing Ring: Select a ring that fits the intended finger perfectly. Measure the internal diameter of the ring in millimeters using a precise ruler.

  • Paper or String Method: Wrap a narrow strip of paper or a piece of string around the base of your finger. Mark the point where the ends meet and measure the length in millimeters to find the circumference.

  • Consider Your Knuckle: If your knuckle is significantly larger than the base of your finger, measure both and choose a size in between to ensure the ring can slide on comfortably.

 

 

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2. Tips for Accuracy

  • Temperature Matters: Finger size can fluctuate slightly based on the temperature. For the most reliable measurement, measure your finger at the end of the day when it is at its largest.

  • Band Width: Wider bands tend to feel tighter than thin bands. If you are purchasing a wide-band ring from our collection, for bands 4mm or wider, we recommend choosing one size larger than your standard measurement.

  • Multiple Measurements: Measure your finger 3–4 times to ensure consistency in your results.

 

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3. International Sizing Chart

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Size Note: These measurements reflect the precise Japanese standards used for our 18k gold collection to ensure a comfortable fit and the lifelong security of your setting. If your measurements fall between two sizes, we recommend choosing the larger size or contacting our team for a personalized recommendation.

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4. Professional Assistance

If you are unsure of your size or are purchasing a piece as a gift, please contact our team for expert guidance. We also recommend visiting a local professional jeweler to have your finger sized using a standard metal ring sizer for the highest level of precision.

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Japan Size
Int. Diameter (mm)
Int. Circumference (mm)
US / Canada Size (Approx.)
5
14.4
45.2
3 ¼
6
14.7
46.2
3 ¾
7
15
47.1
4
8
15.4
48.4
4 ½
9
15.7
49.3
5
10
16
50.3
5 ¼
11
16.3
51.2
5 ¾
12
16.7
52.5
6
13
17
53.4
6 ½
14
17.4
54.7
7
15
17.7
55.5
7 ¼
16
18
56.5
7 ¾
17
18.4
57.8
8
18
18.7
58.7
8 ½
19
19
59.7
8 ¾
20
19.4
60.9
9
21
19.7
61.9
9 ½
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