












Rubber Band Free Gift
Band Reward Details
- Please contact our Customer Support team to choose your preferred color and size.
- One free band per eligible referral reward.
- If multiple colors or sizes are selected, we won't be able to process the shipment.
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If we don't receive your color and size selection before fulfillment, a random band will be shipped.
Add ons
Delivery time is 2–4 weeks depending on the destination, with delivery in under 2 weeks for Asia and the US.

| Size | Circumference (mm) | Diameter (mm) | US | UK/AUS | ITALY | KR | JP | FR | DE |
|---|---|---|---|---|---|---|---|---|---|
| 6 | 51.9 | 16.5 | 5.5,6 | M | 12 | 12 | 12 | 52 | 16.5 |
| 7 | 54.5 | 17.3 | 6.5,7 | N,O | 13,14.5 | 14,15 | 13,14 | 53,54.5 | 17,17.25 |
| 8 | 57 | 18.1 | 7.5,8 | P,Q | 16,17 | 16,17.5 | 15,16 | 56,57 | 17.75,18 |
| 9 | 59.5 | 18.9 | 8.5,9 | R,S | 18.5,19.75 | 18.75,20 | 17,18 | 58.5,59.5 | 18.5,19 |
| 10 | 62.1 | 19.8 | 9.5,10 | T,T½ | 21,22.25 | 21,22.25 | 19,20 | 61,62.5 | 19.5,20 |
| 11 | 64.6 | 20.6 | 10.5,11 | U½,V½ | 23.5,25 | 24,25.25 | 22,23 | 63.5,65 | 20.25,20.75 |
| 12 | 67.2 | 21.4 | 11.5,12 | X¾,Y | 26,27.5 | 26.25,27.75 | 24,25 | 66,67.5 | 21,21.25 |
| 13 | 69.7 | 22.2 | 12.5,13 | Z,Z+1 | 28.75,30 | 29,30.25 | 26,27 | 67,70 | 21.75,22 |
| 14 | 72.5 | 23.1 | 13.5,14 | Z+3 | 32 | 32 | 28 | 72.5 | 23 |
If you are between sizes, opt for the larger size.
*Don't know which size to choose? Share your finger circumference with a CUDIS advisor for expert help.
[Contact Support: support@cudis.xyz]
1.Use a flexible measuring tape or length of string. Wrap it around the finger you'll wear your ring on - if you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
2.Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart above to determine your ring size. If you are between sizes, opt for the larger size.
A helpful method if you're surprising someone with a gift or treating yourself.
1.Choose a ring that already fits your finger well.
2.Measure the interior diameter of the ring in millimeters (mm).
3.Use the measurement chart above to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
Ring Ordering Guide
Diameter 16.5mm
If you are between sizes, opt for the larger size.
*Don't know which size to choose? Share your finger circumference with a CUDIS advisor for expert help. [Contact Support: support@cudis.xyz]
1.Use a flexible measuring tape or length of string. Wrap it around the finger you'll wear your ring on - if you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
2.Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart above to determine your ring size. If you are between sizes, opt for the larger size.
A helpful method if you're surprising someone with a gift or treating yourself.
1.Choose a ring that already fits your finger well.
2.Measure the interior diameter of the ring in millimeters (mm).
3.Use the measurement chart above to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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