Lune Ring

Buy Lune Ring

$89.00 $149.00 Save 40%
Finish: Rose gold
Size: choose one
Quantity
1

Order 2 and save an extra 15% at checkout.

Free tracked shipping, arrives in 7–12 days30-day money-back guarantee, no questionsWrong size? Free exchange within 30 daysSecure checkout with PayPal — Visa and Mastercard accepted
In the box

Lune ring · magnetic charging dock with battery display · USB-C cable · quick-start card · free app on the App Store and Google Play

Find your ring size

Wrap a strip of paper snugly around the base of the finger you'll wear Lune on, mark where it overlaps, and measure the length in millimetres. Measure in the evening when fingers are slightly larger.

US 7 = 54.4 mm · US 8 = 56.9 mm · US 9 = 59.5 mm · US 10 = 62.1 mm · US 11 = 64.6 mm · US 12 = 67.2 mm · US 13 = 69.8 mm

Between sizes? Choose the larger one. Wrong size? We'll swap it for free.

Tech specs.

Sensors
Optical heart-rate and SpO₂ sensor, 3-axis motion sensor
Battery
3–5 days typical, 7 days standby · about 30 min to full
Water resistance
IP68 / 5 ATM
Material
Polished stainless-steel shell, hypoallergenic resin interior
Weight
About 5 g
Sizes
US 7–13
App
Free on the App Store and Google Play · no subscription
Warranty
12 months

Questions people ask before ordering.

How do I know which size to order?

Use the size guide above: measure the inside of a ring you already wear, or wrap a strip of paper around your finger. If you're between sizes, go up. Size exchanges are free within 30 days.

Is there a monthly subscription?

No. The app and all your data are free for as long as you own the ring.

What if I don't like it?

Send it back within 30 days of delivery for a full refund. Nothing to justify.