Unknown knowns line ring + diamond (ice color)

Name: Unknown knowns line ring + diamond (ice color)
Brand: Ryui
Price: 257000.0 JPY
Availability: InStock

"When you stop and look, what matters has always been there, unchanged—" A one-of-a-kind ring from the 2023 collection "Unknown knowns," featuring an opaque ice-colored diamond. Its subtly grayish ice hue gives off a calm, understated sparkle, while the contrast between the diamond and the delicate K18 yellow gold ring arm brings out its brilliance even further. The slender arm offers a lightweight, comfortable fit, making it ideal for everyday wear. It can be worn beautifully on its own or layered with other rings.

Unknown Knowns Series Concept / Image Gallery ▷

material：K18YG , Diamond
stone size：approx. 0.43ct
top size：approx. H5.4mm × W4.8mm × D3.6mm
ring width：approx. 1.5mm
ring size：13

I-1222

*This ring can be resized up to ±3 sizes from the stock size (delivery time: approx. 4-5 weeks).Please select "Resize from stock item", enter your desired size after resizing in the options, and then proceed with your purchase.
*If you would like resizing of more than ±3.5 sizes, please contact us via Contact.

¥257,000

Sale Sold out

Product variants

Regarding made-to-order and resizing items:
*Please note that during busy periods, production may take an additional 1–3 weeks beyond the usual timeframe. We appreciate your understanding.
*Due to our Kyoto Pop-up Store, in-stock items ordered between October 21 (Wed) and October 26 (Mon), 2026, will be shipped on or after October 27 (Tue). We apologize for any inconvenience and appreciate your kind understanding.

Ring Size

Ring size conversion chart

We use Japanese sizes. For international equivalents, please refer to the correspondence table below.

Perimeter (mm)	Inner diameter (mm)	Japan (JCS)	EU (JIS / ISO)	US	UK
40.8	13	1	41	1	C
41.9	13.4	2	42	2	D
42.9	13.7	3	43	2.5	E
44	14	4	44	3	F
45	14.4	5	45	3.5	G
46.1	14.7	6	46	3.5 – 4	G – H
47.1	15	7	47	4 – 4.5	H – I
48.2	15.4	8	48	4.5 – 5	I – J
49.2	15.7	9	49	5	J
50.3	16	10	50	5.5	K
51.3	16.4	11	51	6	L
52.4	16.7	12	52	6.5	L – M
53.4	17	13	53	6.5 – 7	M – N
54.5	17.4	14	54	7 – 7.5	N – O
55.5	17.7	15	55	7.5 – 8	O – P
56.5	18	16	56	8	P
57.6	18.4	17	57	8.5	Q
58.6	18.7	18	58	9	R
59.7	19	19	59	9.5	S
60.7	19.4	20	60	10	T
61.8	19.7	21	61	10 –	T – U
62.8	20	22	62	10.5	UK
63.9	20.4	23	63	11	V
64.9	20.7	24	64	11.5	W
66	21	25	65	12	X

Resizing at the time of purchase

For rings over ¥33,000 (tax included)	We offer complimentary resizing within ±3 sizes from the size in stock. If you wish to have your ring resized, please proceed to the purchase screen of the item and enter the desired size in the remarks form in the shopping cart. Production period: about 4 weeks
For rings under ¥33,000 (tax included)	We do not accept resizing from stock items. Please contact us using the inquiry form and we will make a custom order in the desired size. Production period: about 5 weeks

Selecting your ring size

We recommend choosing a size that you can comfortably wear without feeling pressure or tightness when you make a fist, and without discomfort between adjacent fingers.

For wide rings of 6.0 mm or more
Compared to the number measured with a typical ring gauge, a wide width ring may feel a little tight to wear due to its large surface area. When considering a wide ring, we recommend that you choose a slightly looser size than you usually wear, 1 to 1.5 sizes up.

Please note that some rings cannot be resized due to their design.
Please check the details on each product page.
Contact

Please feel free to contact us using the form below.

Contact Form