{"product_id":"oura-ring-4-brushed-silver-size-5-smart-ring-rings","title":"Oura Ring 4 Brushed Silver Size 5 - Smart Ring Rings","description":"\u003cp\u003eIn this review of the Oura Ring 4 Brushed Silver (Size 5) the bottom line is simple: this ring is for people who want continuous, low-profile health tracking without a wrist device. The reviewer found the ring's biggest appeal is its combination of discreet design and detailed biometrics powered by \u003cstrong\u003eSmart Sensing\u003c\/strong\u003e, which adapts to your patterns to deliver sleep, readiness and activity insights. The caveat is sizing - the included advice to use the Oura Ring 4 Sizing Kit is essential because sizes differ from standard rings and a correct fit greatly affects accuracy and comfort.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize before you buy:\u003c\/strong\u003e The sizing kit is recommended because Oura Ring 4 uses nonstandard sizing, and a proper fit improves sensor contact and data quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Sensing accuracy:\u003c\/strong\u003e Tracks over 50 health metrics including sleep, activity, stress and heart health, with adaptive sensing intended to improve readings over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-titanium design:\u003c\/strong\u003e The brushed silver finish and titanium build deliver durability while remaining comfortable for \u003cstrong\u003e24\/7 wear\u003c\/strong\u003e and suitable for sensitive skin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong lasting battery:\u003c\/strong\u003e Up to 8 days of battery life means less charging and more continuous data capture from workouts to sleep.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMembership access:\u003c\/strong\u003e First month of OURA membership is included for new members, with ongoing subscription options billed monthly or annually for continued analytics.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Oura Ring 4 suits people who prioritize sleep and recovery insights and prefer a compact, wearable form that does not buzz or display notifications. Athletes and busy professionals will appreciate the readiness and activity metrics paired with a long battery life that supports uninterrupted monitoring.\u003c\/p\u003e\u003cp\u003eIt is less suited to users who need rugged scratch resistance as some customers note surface wear over time, or those unwilling to size carefully before purchase. If you prefer a large-screen device with on-demand visible readouts, a smart ring's silent operation may not meet your needs.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent sleep and readiness tracking thanks to adaptive \u003cstrong\u003eSmart Sensing\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDiscrete all-titanium design is comfortable for continuous wear and gentle on sensitive skin.\u003c\/li\u003e\n\u003cli\u003eLong battery life reduces interruptions and supports multi-day tracking.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSizing must be done with the Oura sizing kit because ring sizes differ from standard rings.\u003c\/li\u003e\n\u003cli\u003eSome users report limited scratch resistance on the surface over time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eOura Ring 4 - Brushed Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003eSize 5 (use sizing kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eAll-titanium ring body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003eUp to 8 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetrics tracked\u003c\/td\u003e\n\u003ctd\u003eOver 50 metrics: sleep, activity, stress, heart and womens health metrics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMembership\u003c\/td\u003e\n\u003ctd\u003eFirst month included for new members; subscription available monthly or prepaid annually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Oura Ring 4 Brushed Silver is a strong choice for anyone who values continuous, private health monitoring in a minimal form factor. When sized correctly it offers accurate sleep and readiness insights and reliable multi-day battery life, making it good value for users seeking deep biometric trends rather than on-device displays.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDo I need the sizing kit?\u003c\/strong\u003e\u003cbr\u003eYes. Oura Ring 4 uses nonstandard sizes and the sizing kit is recommended to ensure accurate fit and sensor contact.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs membership required to use the ring?\u003c\/strong\u003e\u003cbr\u003eThe ring works with the Oura App, and a free first month is included for new members; ongoing access to advanced analytics requires a subscription.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long does the battery last?\u003c\/strong\u003e\u003cbr\u003eTypical battery life is up to 8 days depending on usage, allowing multi-day wear between charges.\u003c\/p\u003e","brand":"OURA","offers":[{"title":"Default Title","offer_id":48678519046363,"sku":"B0D9WWF9L9","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51yQA1CgzLL._AC_SL1000_c16a8a72-121c-4e5f-a7f5-d10a79d0e1e6.jpg?v=1778692382","url":"https:\/\/gearmusthave.com\/products\/oura-ring-4-brushed-silver-size-5-smart-ring-rings","provider":"GearMustHave","version":"1.0","type":"link"}