The Oura Ring 4 Ceramic delivers advanced health tracking in a sleek, ultra-comfortable design. Powered by next-generation Smart Sensing technology, it provides highly accurate insights into sleep, recovery, activity, heart rate, stress and overall wellbeing. Crafted from durable zirconia ceramic with a titanium inner core, it offers premium comfort for 24/7 wear, up to 8 days of battery life and water resistance up to 100 metres.
| Product Type |
Smart Ring |
| Model |
Oura Ring 4 Ceramic |
| Colours |
Cloud / Midnight / Petal / Tide |
| Material |
Zirconia Ceramic / Titanium |
| Battery Life |
Up to 8 Days |
| Water Resistance |
100 Metres (10 ATM) |
| Connectivity |
Bluetooth Low Energy |
| Compatibility |
iOS & Android |
| Health Tracking |
Sleep, Recovery, Activity, Heart Rate, Stress, Temperature Trends |
| Available Sizes |
Oura Sizes 4–15 |
Size Guide
| Oura Size |
UK Size |
EU Size |
| 4 |
H |
47 |
| 5 |
J |
49 |
| 6 |
L |
52 |
| 7 |
N |
54 |
| 8 |
P |
57 |
| 9 |
R |
60 |
| 10 |
T |
62 |
| 11 |
V |
65 |
| 12 |
X |
67 |
| 13 |
Z |
70 |
| 14 |
Z+1 |
72 |
| 15 |
Z+3 |
75 |
