RING SIZE

If the ring you received does not fit, we accept exchanges for domestic orders if you contact us within 7 days of delivery.
Please feel free to consult with us if you are unsure about choosing a size.

About Ring Size Notation

Ring sizes are indicated either in Japanese size (gou) or as S, M, or L, depending on the product.
For products labeled S, M, or L, the corresponding Japanese size is listed on the product page; please refer to it alongside the size chart below.

Ring Size Chart
Ring Size (Japanese) Inner Diameter (mm) Inner Circumference (mm)
1 13 40.84
2 13.33 41.89
3 13.66 42.94
4 14 43.98
5 14.33 45.03
6 14.66 46.08
7 15 47.12
8 15.33 48.17
9 15.66 49.22
10 16 50.27
11 16.33 51.31
12 16.66 52.36
13 17 53.41
14 17.33 54.45
15 17.66 55.5
16 18 56.55
17 18.33 57.6
18 18.66 58.64
19 19 59.69
20 19.33 60.74
21 19.66 61.78
22 20 62.83
23 20.33 63.88
24 20.66 64.93
25 21 65.97

If You Are Unsure of Your Size

If you do not know your size, please use the measurement tool below.
You can check your approximate size simply by placing a ring you normally wear on your smartphone or tablet screen.
If you do not have a ring, you can also measure by the circumference of your finger.

Measure Your Ring Size

Ring Width and Tips for Choosing a Size

The fit of a ring can vary depending on its design and width.
Wider rings (voluminous designs) have a larger surface area in contact with the finger, so they tend to feel tighter than thinner rings of the same size. Therefore, when choosing a wider design, we recommend selecting a size about one size larger than what you usually wear.

International Ring Size Conversion Chart

Ring size standards vary by country and region.
If you know your size in another country, please use the conversion chart below as a guide to check the size that fits you.

International Ring Size Conversion Chart
Japan US Italy
1 1 1
2 2 2
3 2.5 3
4 3 4
5 3.5 5
6 3.75 6
7 4 7
8 4.5 8
9 5 9
10 5.25 10
11 5.75 11
12 6 12
13 6.5 13
14 7 14.5
15 7.5 15.5
16 7.75 16.5
17 8 17.5
Size 18 8.5 18.5
Size 19 9 19.5
Size 20 9.5 21
Size 21 9.75 22
Size 22 10 23
Size 23 10.5 24
Size 24 11 25
Size 25 11.5 26

Need help choosing your ring size?

“I’m worried about whether it will fit my finger…”
“I’d like a slightly smaller (or larger) size.”

If you have any requests or questions regarding sizing, please don't hesitate to reach out to us. We will do our best to support you so that our jewelry fits your hands as beautifully as possible.

About Size Exchanges

If the ring you received does not fit, we can exchange it for a different size if you contact us within 7 days of delivery (limited to orders shipped within Japan).
For detailed terms and conditions, please see our Returns & Exchanges page.

If you have any other questions, please feel free to consult us through the channels below: