{"product_id":"circular-ring-2-smart-ring-size-before-you-buy","title":"Circular Ring 2 - Smart Ring - Size Before You Buy","description":"\u003cp\u003eCircular Ring 2 combines a jewelry design with tracking of 140+ biosignals across 13+ health features - including ECG, AI coaching, sleep, activity, recovery and more. Unlike trackers that only show numbers, Circular pairs data with Kira, your personal AI health coach, who translates trends into simple, actionable advice. A health lab on your finger, with a subscription-free experience and premium features like blood pressure and glucose trend coming soon.Circular Ring sizes are different from standard ring sizes. We recommend finding your size before purchasing your ring. Purchase our Circular Ring sizing kit to find your optimal size, then come back and order the right size. \u003ci\u003e\u003cstrong\u003eSizing Tips - \u003c\/strong\u003e\u003c\/i\u003eCircular Ring 2 is available in 9 sizes, from US 6 to US 14 (no half sizes). Ring sizes run about one half size above standard ring sizes. For example, if you normally wear a size 9, we recommend choosing a size 10.You can wear the Circular Ring 2 on any finger, but all four fingers aside from the thumb give the most accurate readings. The thumb still works but with less precision. The Circular ring is best worn on your non-dominant hand.Finger size changes during the day! Sizing is most accurate midday.The Circular logo of the ring should face the top of your finger, and the flat sensor part should face your palm.‍Between Sizes?Choose the larger size but make sure it’s snug enough not to fall off. If you have large knuckles, choose the smallest size that slides over them comfortably.\u003ci\u003e\u003cstrong\u003eHighlights - \u003c\/strong\u003e\u003c\/i\u003eSize Before You Buy- Order a Circular sizing kit to find your optimal size, then come back and purchase your Circular Ring 2.Designed Not to Distract -  No lights, no buzzes, just a luxury ring that fits seamlessly into your daily life with no distractions.Battery \u0026amp; Charging -  Wear it for up to 8 days straight. Then wirelessly recharge in just 30 minutes.Designed for daily wear -  Titanium body, hypoallergenic interior- Finished with a durable PVD coating protecting it from scratches and wear. Circular Ring 2 is fully waterproof, safe for swimming, showering, and daily wear.No Subscription Required -  All 13+ health core features and 140+ biometrics are free forever. Only a small number of premium features use a freemium model (free \u0026amp; paid partially with coins or money). All the core features are free, no subscription required.Kira™ Coaching -  The Circular Ring captures over 8 key health signals and the app turns those readings into clear, easy to understand insights. You see patterns in your recovery, energy, stress, and sleep without needing to decode anything. Kira, your AI health coach, watches for any changes in your vitals, spots early warning signs, and sends you gentle, helpful recommendations. No searching. No guessing. Kira already knows what matters and what to do next.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBlood Pressure Monitoring -  Track your blood pressure trends. Understand how stress,sleep, and activity affect your heart health over time. Coming as a premium feature in early 2026.\u003c\/li\u003e\n\u003cli\u003eGlucose Trend Monitoring -  Stay ahead of your blood sugar fluctuations with non-invasive tracking. Ideal for those managing energy levels, metabolism, or early glucose sensitivity. Planned for mid 2026, as a premium feature.\u003c\/li\u003e\n\u003cli\u003eECG + AFib Detection -  Track your heart rhythm with world’s first medical-grade technology and catch signs of arrhythmia before symptoms appear.\u003c\/li\u003e\n\u003cli\u003eSleep Tracking -  Monitor sleep stages, breathing, and oxygen levels to understand how well your body recovers overnight.\u003c\/li\u003e\n\u003cli\u003eWomen’s Health -  Keep track of your cycle, hormonal shifts, and fertility with personalized insights based on your vitals.\u003c\/li\u003e\n\u003cli\u003eStress \u0026amp; Energy Monitoring -  See how stress affects your body and get guidance on when to rest or push harder.\u003c\/li\u003e\n\u003cli\u003eAdvanced analytics -  Make graphs overlap and understand how different metrics are linked.\u003c\/li\u003e\n\u003cli\u003eEnergy monitoring -  Get stats and in depth insights about your energy levels.\u003c\/li\u003e\n\u003cli\u003eLive measurement -  On-demand spot measurement for HR, SpO2, HRV, activity intensities, and Max HR.\u003c\/li\u003e\n\u003cli\u003eAlarm clock -  Wakes you up with a smart alarm during your lightest sleep stage with your phone's vibrations.\u003c\/li\u003e\n\u003cli\u003eGuided breathing -  Launch guided breathing exercises to relax, sleep better, and more.\u003c\/li\u003e\n\u003cli\u003eVital alerts -  Get notified when you vitals are going off.\u003c\/li\u003e\n\u003cli\u003eMedication -  Never forget to take your meds anymore and keep track of your intakes.\u003c\/li\u003e\n\u003cli\u003eCoherence -  Dive into a state of optimal function and regulate your emotions and clarity.\u003c\/li\u003e\n\u003cli\u003eSport Sessions -  Track outdoor activities with a GPS trace and reports.\u003c\/li\u003e\n\u003cli\u003eAirplane Mode -  Disable ring’s Bluetooth communication.\u003c\/li\u003e\n\u003cli\u003eTimer -  Set a timer for your workout or anything else.\u003c\/li\u003e\n\u003cli\u003eCalendar -  Add manual notes that are reflected in the app and add context to your data.\u003c\/li\u003e\n\u003cli\u003eHeart Rate + HRV -  24\/7 heart rate \u0026amp; morning resting heart rate and heart rate variability.\u003c\/li\u003e\n\u003cli\u003eBreathing Rate -  Breathing rate during sleep periods.\u003c\/li\u003e\n\u003cli\u003eBlood oxygenation -  Medical grade SpO2 levels during sleep \u0026amp; rest periods.\u003c\/li\u003e\n\u003cli\u003eTemperature -  Temperature variations trends help detect fever, menstrual cycles.\u003c\/li\u003e\n\u003cli\u003eKira™ Coaching -  Your AI health coach turns complex data into clear, actionable tips tailored to your lifestyle.\u003c\/li\u003e\n\u003cli\u003eBattery \u0026amp; Charging -  Wear it for up to 8 days straight. Then wirelessly recharge in just 30 minutes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCircular Ring 2\u003c\/li\u003e\n\u003cli\u003eWireless Charging Case\u003c\/li\u003e\n\u003cli\u003eUSB-C cable\u003c\/li\u003e\n\u003cli\u003eCleaning Cloth\u003c\/li\u003e\n\u003cli\u003eApp Access\u003c\/li\u003e\n\u003cli\u003eDigital User Guide\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTechnical Specs\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTitanium body, hypoallergenic interior\u003c\/li\u003e\n\u003cli\u003e2.55mm thick, 7.8mm wide, 3 grams\u003c\/li\u003e\n\u003cli\u003eSizes -  US 6–14\u003c\/li\u003e\n\u003cli\u003eBattery -  8 days (Power Mode), 5 days (Performance)\u003c\/li\u003e\n\u003cli\u003eCharging -  30 mins via wireless charger\u003c\/li\u003e\n\u003cli\u003eECG, PPG, temp sensor, 3x accelerometer\u003c\/li\u003e\n\u003cli\u003eBluetooth Low Energy, Airplane Mode\u003c\/li\u003e\n\u003cli\u003eiOS \u0026amp; Android compatible\u003c\/li\u003e\n\u003cli\u003eGDPR \u0026amp; HIPAA compliant\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"2759","offers":[{"title":"rose gold - 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