Even Realities - Even R1 Smart Ring - Size 11 - Gray - (2025)

The Sizing Kit is a crucial first step for ensuring a perfect fit for the Even R1 smart ring. It includes a set of non-functional dummy rings in a full range of sizes (6 to 15). Since smart rings require a snug yet comfortable fit for accurate sensor readings, this kit allows you to test different sizes in real-world conditions before committing to your final Even R1 purchase. Because finger size naturally fluctuates with temperature, time of day, and activity level, wearing a test ring helps you find the "sweet spot"—a size that prevents light from interfering with the sensors without feeling restrictive.

The Ultrahuman Ring PRO is a sleek, lightweight smart ring designed to help you better understand your body and optimize your daily performance. Built with advanced health tracking technology, it continuously monitors key wellness metrics including sleep quality, recovery, heart rate, movement, and stress patterns. Its durable, minimalist design provides all-day comfort while delivering personalized insights through the Ultrahuman app, helping users make smarter decisions about fitness, recovery, and overall well-being. Ideal for active lifestyles, the Ring PRO combines premium craftsmanship with intelligent health tracking in a discreet wearable form factor.

Meet the QALO SR-2, our second-generation smart ring and a slimmer, featherlight way to track your health, fitness, sleep and recovery, with no subscription required. Sizing is important: QALO SR-2 uses a unique sizing system that differs from standard jewelry rings and other smart rings, so please use the QALO sizing chart in the product images before you buy. If you are between sizes, size up to account for natural finger swelling and knuckle width. At just 2.2mm thin, the SR-2 is 25% thinner than the original SR-1 and built to disappear on your finger, with up to 5 days of battery on a single charge. Upgraded sensors track heart rate, heart rate variability (HRV), blood oxygen (SpO2), stress, skin temperature, sleep stages, steps, calories, distance and workouts, while women’s health tracking provides insights across every cycle phase. Everything comes together in the free, secure QALO app for iOS and Android, because better health shouldn’t be a luxury. In the box: QALO SR-2 Smart Ring, charging case, USB-C charging cord, plus black and white silicone ring covers that add comfort, help protect the ring from everyday scratches and let you switch up your look.