Fitness rings · Model guide · Maker specs
Oura Ring 4 Ceramic
Get Oura Ring 4 Ceramic if you want Ring 4 in ceramic: the same sensors and 4–15 size range in a zirconia shell, at $399 on sale or $499 list.
Product images
Oura Ring 4 Ceramic, from its Amazon listing.
Credit: Amazon.com (Associates Program). Amazon listing
Product image from the Amazon listing.
In short
Get Oura Ring 4 Ceramic if you want Ring 4 in ceramic: the same sensors and 4–15 size range in a zirconia shell, at $399 on sale or $499 list. Ceramic makes it thicker and heavier than titanium Ring 4, at 3.51mm and 5.1–8.1 grams against about 2.88mm and 3.3–5.2 grams. It needs the same paid Oura Membership as every Oura from Gen3 on. In sizes 6–13, Ring 5 is slimmer, at 2.28mm thick.
Who it is for
- Anyone who wants an Oura in ceramic rather than metal, in Midnight or Cloud.
- People who need a size 4, 5, 14 or 15 and like the ceramic finish. It uses the Ring 4 kit and size range, while Ring 5 only comes in 6–13.
- Current Oura members swapping to ceramic. Membership goes with your Oura account, so there's nothing new to sign up for.
Who should skip it
- Anyone in sizes 6–13 who'd rather have a slim ring. Ring 5 measures 6.09 by 2.28mm; Ceramic is 7.9 by 3.51mm.
- Anyone who wants the lightest Ring 4. Titanium Ring 4 weighs 3.3–5.2 grams and is about 2.88mm thick.
- Anyone who won't pay for a membership, or who wants 10–14 days per charge. Most of Ceramic's app sits behind Oura Membership, and its battery is rated for typically 5–8 days.
What sets it apart
- Zirconia ceramic outside and seamless titanium inside, with the sensors recessed into a 0.3mm dome.
- The same Smart Sensing as titanium Ring 4: red and infrared LEDs for blood oxygen, green and infrared for 24/7 heart rate, HRV and respiration, plus a temperature sensor and an accelerometer.
- Sizes 4–15 on the Ring 4 kit, a wider range than Ring 5's 6–13.
- A ceramic polishing pad in the box, and no Proposition 65 warning, which titanium Ring 4 and Gen3 carry, Oura says.
Caveats
- Only Midnight and Cloud had US prices on 19 September 2026. Oura has pages for Tide and Petal, but they showed the Midnight listing, with no price of their own.
- Oura says its rings aren't medical devices, and Ceramic is no exception: treat the health readings as wellness information.
Key specs
In the same order on every ring page, so you can compare models.
| Spec | Value | Source and notes |
|---|---|---|
| Materials | High-performance zirconia ceramic outside; seamless titanium inside; sensors recessed 0.3 mm | Oura Ring 4 support (comparison table); Oura store, Ceramic page |
| Width | 7.9 mm | Oura Ring 4 support; Oura store, Ceramic page |
| Thickness | 3.51 mm; recessed sensor dome 0.3 mm | Oura Ring 4 support (comparison table); Oura store |
| Weight | 5.1–8.1 g, depending on ring size | Oura Ring 4 support; Oura store |
| Sizes | 4–15 (Ring 4 sizing kit, not the Ring 5 kit for 6–13) | Oura Ring 4 support |
| Finishes | Midnight, Cloud ($399 on sale, $499 list, on 19 September 2026). Oura also has Tide and Petal pages, but they showed the Midnight listing without a price of their own | Oura store; Oura's Midnight, Cloud, Tide and Petal pagesOura says finishes and sizes depend on current inventory. |
| Battery | Typically 5–8 days (same rating as Ring 4) | Oura Ring 4 support; Oura store, Ceramic pageVaries with ring size, settings, activity and battery age. |
| Charging | Typically 20–80 minutes, depending on the starting charge | Oura Ring 4 support; Oura store, Ceramic page |
| Charging case | Size-specific charger and USB-C cable in the box; not a travel case like Ring 5's | Oura store, Ceramic “What's Included”; General FAQs (updated 18 September 2026) |
| Water resistance | 100 m (328 ft). Ring 4 support: sauna and water sports, not diving. General FAQs and Product Safety: showering, swimming, recreational diving and snorkeling are fine; no scuba; don't leave it submerged for more than 12 hours | Oura Ring 4 support; General FAQs (updated 18 September 2026); Product Safety & Use |
| Sensors | Same Smart Sensing as titanium Ring 4: red and infrared LEDs for SpO2; green and infrared for 24/7 heart rate, HRV and respiration; digital temperature sensor; accelerometer | Oura Ring 4 support (comparison table); Oura store, Ceramic page |
| Sleep tracking | Detailed sleep analysis with membership; nighttime blood oxygen (SpO2) from the red and infrared LEDs | Oura Ring 4 support |
| Activity / fitness | 24/7 heart rate; Automatic Activity Detection; dynamic activity goals (membership) | Oura Ring 4 support |
| App | Oura app (iOS and Android) | Oura store, Ceramic page; Set up the Oura App |
| Subscription / data access | Oura Membership (US $5.99/month or $69.99/year; 1 free month for new members). It applies to Gen3 and newer rings, including Ceramic | Oura Membership support (updated 8 September 2026) |
| Phone platforms | iOS 16 or later, or Android 11 or later with Google Play; the phone must support Bluetooth 5.0 | Oura General FAQs; Product Safety & Use |
| Wireless | Bluetooth Low Energy; Airplane Mode; EMF-safe; FCC certified | Oura store, Ceramic page; Oura Ring 4 support |
| On-ring storage | Up to one week (seven days); Oura's safety guide gives Ring 4 and Gen3 the same figure | Oura Product Safety & Use (updated 19 June 2026) |
| US price | $399 on sale, $499 list (Midnight, Cloud) on 19 September 2026. The Ceramic page showed €429 and €549 when it switched to euros that evening | Oura store (US dollars); Oura store, Ceramic page (euros) |
| Price band | Previous-generation ceramic ring, plus the membership | Oura store |
| Announced | Ring 4 generation | Oura Ring 4 support (updated 18 June 2026) |
| Availability | On sale at Oura's US store on 19 September 2026. Oura says stock varies, so check its store or an authorized retailer | Oura Ring 4 support; Oura store |
Oura Ring 4 Ceramic extras
Specs only this model has.
| Spec | Value | Source and notes |
|---|---|---|
| Versus titanium Ring 4 | Same sensors, charging, battery rating, size range and membership. Ceramic is zirconia, 3.51 mm thick and 5.1–8.1 g | Oura Ring 4 support (comparison table) |
| In the box | Oura Ring 4 Ceramic; size-specific charger; USB-C cable; ceramic polishing pad | Oura store, Ceramic page |
| Sizing kit | Ring 4 kit: white sizers, 4–15. Not the Ring 5 kit (6–13) | Oura Ring 4 support |
| Proposition 65 | Ceramic doesn't need a Prop 65 warning, Oura says; titanium Ring 4 and Gen3 carry one | Oura Product Safety & Use |
| Latest firmware | Ring 4 firmware applies: 2.12.0 (17 June 2026). Oura lists no separate Ceramic firmware, and no newer Ring 4 build as of 19 September 2026 | Oura Device Firmware Versions (updated 17 June 2026) |
| Prices in euros | On 19 September 2026 Oura's store sometimes showed euros instead of dollars. The Ceramic page showed €429 and €549; the store grid showed Ceramic from €300.30, with €429 as the list price. In dollars, the grid showed $399 and $499 (Midnight, Cloud) | Oura store; Oura store, Ceramic pageThe two euro figures don't match each other. |
Ring 4 in a ceramic shell
Everything that tracks you is Ring 4’s: the same Smart Sensing, battery rating, charging and membership, and the same 4–15 size range. What changes is the outside, a zirconia ceramic shell over a seamless titanium inner band, and that makes it the thicker, heavier version.
| Spec | Oura Ring 4 Ceramic | Oura Ring 4 (titanium) |
|---|---|---|
| Outside | Zirconia ceramic | Titanium |
| Width | 7.9 mm | 7.9 mm |
| Thickness | 3.51 mm | About 2.88 mm |
| Weight | 5.1–8.1 g | 3.3–5.2 g |
| Sizes | 4–15 | 4–15 |
| Battery | Typically 5–8 days | Typically 5–8 days |
Next to Ring 5, Ceramic is the older and bulkier ring, but Ring 5 only comes in 6–13. Choose Ceramic over Ring 5 for the ceramic finish or a size Ring 5 doesn’t make. Oura Ring 4 Ceramic vs Oura Ring 5 has the side-by-side.
Battery, charging and the box
Oura rates Ceramic at typically 5–8 days, the same as titanium Ring 4, and a recharge takes 20–80 minutes depending on how low it is. The box has a charger made for your ring size, a USB-C cable and a ceramic polishing pad; you get a charger, not a travel case like Ring 5’s. It stores up to seven days of data between syncs.
Sensors and the app
Red and infrared LEDs handle blood oxygen at night; green and infrared handle 24/7 heart rate, HRV and respiration. A digital temperature sensor and an accelerometer round it out. With a membership you get Oura’s detailed sleep analysis and round-the-clock heart rate, plus Stress, Heart Health and Women’s Health. Oura’s app supports iOS 16 and Android 11 (with Google Play) or later. Ceramic runs Ring 4’s firmware, most recently 2.12.0 from 17 June 2026.
Water
Ceramic is rated to 100 meters (328 feet), like titanium Ring 4. Oura’s Ring 4 page rules out diving; its general FAQ is looser, allowing recreational diving and snorkeling, though never scuba and never more than 12 hours underwater.
Price
On Oura’s US store, Midnight and Cloud were $399 on sale, against a $499 list price, on 19 September 2026. When the store switched to euros that evening, the Ceramic page showed €429 and €549, while the store grid showed Ceramic from €300.30, with €429 as the list price; the two don’t agree. On top of the ring comes the membership, from $5.99 a month in the US. Prices and stock move, so check before you buy.
Sources
- Amazon product listing — accessed 2026-09-20
- Oura store — Ring 4 Ceramic — accessed 2026-09-19
- Oura store — rings and accessories — accessed 2026-09-19
- Oura Member Care — Oura Ring 4 — accessed 2026-09-19
- Oura Member Care — Oura Membership — accessed 2026-09-19
- Oura Member Care — General FAQs — accessed 2026-09-19
- Oura Member Care — Product Safety & Use — accessed 2026-09-19
- Oura Member Care — Device Firmware Versions — accessed 2026-09-19
Frequently asked questions
Is Ring 4 Ceramic the same as titanium Ring 4?
Yes, apart from the shell. It has the same Smart Sensing, battery rating, charge time, sizes 4–15 and membership; what differs is the zirconia outside, the extra thickness and weight, and a polishing pad in the box.
Does Ring 4 Ceramic need Oura Membership?
Yes. Oura Membership covers Gen3 and newer rings, Ceramic included, at $5.99 monthly or $69.99 yearly in the US after a free first month. Without it you're left with the three daily scores, the battery level, your profile, settings and Explore.
Which sizing kit does Ceramic use?
The Ring 4 kit, with white sizers from 4 to 15. Don't size with a Ring 5 kit: it only covers 6–13, and Oura says Ring 5 sizes slightly differently.
Is Ceramic still sold in the US?
Yes. Oura's US store had Midnight and Cloud at $399 on sale ($499 list) on 19 September 2026, though Oura says finishes and sizes depend on inventory.
Official product page: Oura Ring 4 Ceramic. Specs: Oura Ring 4 Ceramic specs.