Comparison · Fitness rings · Desk research
Oura Ring 4 vs Oura Ring 4 Ceramic
Side-by-side manufacturer cells from the two named ring pages. Not a lab test. Brand grouping uses the published brand field (Oura).
Quick Answer
Oura Ring 4 vs Oura Ring 4 Ceramic is a desk comparison of OEM cells (verified 2026-09-19 / 2026-09-19). Oura Ring 4: From $349 US (Silver/Stealth) on ouraring.com/store, 2026-09-19; Gold listed $399–$499. Oura Ring 4 Ceramic: $399 sale / $499 list (Midnight, Cloud) on ouraring.com/store, 2026-09-19. Dedicated ceramic SKU URL flipped to €429 / €549 on the same evening pull.. Battery: Typically 5–8 days vs Typically 5–8 days (same Ring 4 claim). Not a lab test.
The verdict
Oura Ring 4 for new buyers on this Oura line; Oura Ring 4 Ceramic if the leftover size, finish, or dated ticket is the fit
Why: Same brand (Oura). Oura Ring 4 ranks newer/current on this line. Cells are OEM quotes dated 2026-09-19 / 2026-09-19 — not a lab winner for comfort, accuracy, or real-world battery.
Buy Oura Ring 4 if
Buyers who need sizes 4–5 or 14–15, which Ring 5 does not sell.
Buy Oura Ring 4 Ceramic if
Buyers who want zirconia scratch-resistance / luster and still need sizes 4–5 or 14–15.
Specs side by side
Same rows as the two named ring pages. Values are copied from those pages — if a cell is unpublished or contradictory on the manufacturer page, it already says so.
| Attribute | Oura Ring 4 | Oura Ring 4 Ceramic |
|---|---|---|
| Materials | Titanium exterior and interior with PVD or DLC depending on finish; non-allergenic BPA-free titanium inner shellOura Ring 4 support | High-performance zirconia ceramic exterior; seamless titanium interior; recessed sensors 0.3 mmOura Ring 4 support compare table; store tech specs |
| Width | 7.9 mmOura Ring 4 support compare table | 7.9 mmOura Ring 4 support; ouraring.com/store/rings/oura-ring-4-ceramic |
| Thickness | ~2.88 mm; recessed sensor dome 0.3 mmOura Ring 4 support | 3.51 mm; recessed sensor dome 0.3 mmOura Ring 4 support compare table; store |
| Weight | 3.3–5.2 g depending on size (titanium SKU)Oura Ring 4 support | 5.1–8.1 g depending on ring sizeOura Ring 4 support; store |
| Sizes | 4–15 (Ring 4 sizing kit)Oura Ring 4 support | 4–15 (Ring 4 sizing kit — not the Ring 5 6–13 kit)Oura Ring 4 support |
| Finishes | Store still listed Gold, Silver, Stealth on 2026-09-19; confirm live inventoryouraring.com/store | Store grid listed Midnight and Cloud at $399 / $499 US on 2026-09-19 evening. Tide and Petal have official URLs (/tide, /petal) but this evening’s fetch rendered Midnight page chrome without a distinct priced picker. Confirm live inventory.ouraring.com/store; ceramic Midnight/Cloud/Tide/Petal URLs |
| Battery (OEM) | Typically 5–8 daysOura Ring 4 supportOura: varies by size, settings, activity, battery age. | Typically 5–8 days (same Ring 4 claim)Oura Ring 4 support; Ceramic storeOura: varies by size, settings, activity, battery age. |
| Charging (OEM) | Typically 20–80 minutes depending on starting chargeOura Ring 4 support | Typically 20–80 minutes depending on starting chargeOura Ring 4 support; Ceramic store |
| Charging case (OEM) | Size-specific charging dock + USB cable in the box (General FAQs). Not a Ring 5 travel case.Oura General FAQs 2026-09-18; Use Your Oura Ring Charger | Size-specific charger + USB-C in the box. Not a Ring 5 travel case.Ceramic store “What's Included”; General FAQs 2026-09-18 |
| Water resistance | 100 m / 328 ft. Ring 4 support: sauna and water sports, not diving. General FAQs / Product Safety (updated 2026-09-18): showering, swimming, recreational diving/snorkeling OK; not scuba; do not keep submerged over 12 hours.Oura Ring 4 support; General FAQs 2026-09-18; Product SafetyCite the page. Do not flatten “not diving” over the General FAQs recreational-diving sentence. | 100 m / 328 ft. Ring 4 support: sauna and water sports, not diving. General FAQs / Product Safety: showering, swimming, recreational diving/snorkeling OK; not scuba; do not keep submerged over 12 hours.Oura Ring 4 support; General FAQs 2026-09-18; Product SafetyCite the page. Do not flatten support “not diving” and FAQ “recreational diving” into one invented rule. |
| Sensors | Smart Sensing; 3 photodetectors + 2 triple LEDs (red, green, IR); digital temperature; accelerometerOura Ring 4 support | Same Smart Sensing as titanium Ring 4: red + IR for SpO2; green + IR for 24/7 HR / HRV / respiration; digital temperature; accelerometerOura Ring 4 support compare table; Ceramic store |
| Sleep tracking | Detailed sleep analysis with membership; nighttime SpO2 via red + IROura Ring 4 support | Detailed sleep analysis with membership; nighttime SpO2 via red + IROura Ring 4 support |
| Activity / fitness | 24/7 HR; Automatic Activity Detection; dynamic activity goals (membership)Oura Ring 4 support | 24/7 HR; Automatic Activity Detection; dynamic activity goals (membership)Oura Ring 4 support |
| App | Oura AppOura Ring 4 support | Oura App (iOS / Android)Ceramic store; Set up the Oura App |
| Subscription / data access | Oura Membership (US $5.99/mo or $69.99/year; 1 complimentary month for new members). Same account rules as Ring 5.Oura Membership support; Ring 4 support | Oura Membership (US $5.99/mo or $69.99/year; 1 complimentary month for new members). Applies to Gen3 and newer — including Ceramic.Oura Membership support 2026-09-08 |
| Phone platforms | iOS 16+ or Android 11+ with Google Play; Bluetooth 5.0 phoneOura Set up the Oura App / General FAQs | iOS 16+ or Android 11+ with Google Play; Bluetooth 5.0 phoneOura General FAQs / Product Safety |
| Wireless | Bluetooth Low Energy (Bluetooth Smart); EMF-safe; Airplane Mode; FCC certifiedOura Ring 4 support | Bluetooth Low Energy; EMF-safe; Airplane Mode; FCC certifiedCeramic store; Oura Ring 4 support |
| On-ring storage | Up to one week (seven days)Oura Ring 5 support compare table (Ring 4 column) | Up to one week (seven days) — Product Safety groups Ring 4 with Gen3Oura Product Safety & Use 2026-06-19 |
| US price (dated) | From $349 (Silver/Stealth) on ouraring.com/store, 2026-09-19ouraring.com/store | $399 sale / $499 list (Midnight, Cloud) on ouraring.com/store, 2026-09-19 evening. Dedicated SKU URL ouraring.com/store/rings/oura-ring-4-ceramic flipped to €429 / €549 on the same pull.ouraring.com/store (USD grid); ouraring.com/store/rings/oura-ring-4-ceramic (euro flip, 2026-09-19 evening)This environment can resolve Oura to euros. Prefer the US store grid for the US price cell. Do not invent a dollar midpoint from the euro page. |
| Price band | Leftover flagship membership ringDerived from dated US store | Leftover ceramic membership ringDerived from dated US store |
| Announced | Previous current generation; support last updated 18 June 2026Oura Ring 4 support | Ring 4 generation; support last updated 18 June 2026Oura Ring 4 support |
| Availability | Still listed on the Oura store 2026-09-19; Oura says check store or authorized retailer for inventoryOura Ring 4 support; store | Still listed on the Oura store 2026-09-19. Support: check store or authorized retailer; inventory may vary. Dedicated ceramic URL geo-flipped to euros on the evening re-pull. 4:20 PM ET re-pull: /store grid itself euros. Same-day USD cells kept.Oura Ring 4 support; store; ceramic SKU URL |
Oura Ring 4 hub notes
- Widest current Oura size run: 4–15.
- Smart Sensing + recessed sensors; up to 7 days of onboard memory (vs 3 on Ring 5).
- Same membership feature list as Ring 5.
Ring 4 is the leftover Oura with the wide size run (4–15), 7.9 × ~2.88 mm titanium, typically 5–8 days, and the same paid membership app as Ring 5. Buy it for extreme sizes or leftover price. Skip it if you fit 6–13 and want the smaller Ring 5, or if you will not pay membership.
Oura Ring 4 Ceramic hub notes
- Zirconia exterior + titanium interior; same Smart Sensing as titanium Ring 4.
- Thicker/heavier than titanium Ring 4: 3.51 mm / 5.1–8.1 g vs ~2.88 mm / 3.3–5.2 g.
- Sizes 4–15 (Ring 4 kit). Ring 5 is 6–13 only.
Ceramic is leftover Ring 4 sensing in a zirconia body: $399 sale / $499 list on 2026-09-19, sizes 4–15, typically 5–8 days, same paid membership. Buy it for the ceramic finish and the wide size run. Skip it if you want the smaller Ring 5, titanium weight, or no subscription.
Sources
Union of the two hub source lists. Re-open the OEM URL, not this comparison, to refresh a cell.
- Oura Member Care — Oura Ring 4 — accessed 2026-09-19
- Oura store — accessed 2026-09-19
- Oura Member Care — Discover Oura Ring 5 (Ring 4 compare column) — 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
- Oura store — Ring 4 Ceramic — accessed 2026-09-19
Hub A: Oura Ring 4. Hub B: Oura Ring 4 Ceramic.