Wherever I go, whatever I do, people point at my finger and ask, “Is that an Oura Ring?” Lots of people find they like the design, and they tell me why they’re thinking about switching to a smart ring from a smartwatch. But the people who scrunch up their noses? They usually say something along the lines of, “Hm. Maybe when it’s lighter or smaller.” Good news. The newly announced $399 Oura Ring 5 is both. It’s 40 percent smaller than the Oura Ring 4 , measuring 6.09mm wide (down from 7.9mm) and