The Best Smart Rings, Tested and Reviewed (2025)

There is plenty to consider when buying a smart ring, so use these tips to help you narrow your choice and get the best from it. Size: Some smart rings come in standard sizes, but there is some variation, and half sizes are rare. Most manufacturers will send you a free sizing kit, enabling you to wear a dummy ring for 24 hours to ensure you get the right fit. (You may have to buy the ring directly from the manufacturer to get this kit for free.) You should absolutely do this. Bear in mind that your fingers swell and shrink over the day. Your smart ring should be snug to enable the sensors to measure accurately, and it will work best on your index finger (though the middle or ring finger can work). Finish: All the smart rings we tested combined tough titanium with a sensor array on the inside, but the coatings and colors vary. If you are hard on rings, a silver or gold finish will likely suit you best, as there is less risk of damage. My Oura and Ultrahuman rings with black finishes h ... Read full article.