Customer Ratings & Reviews

Having smaller hands and fingers, I mainly upgraded to the 5 from the 4 because of the benefits of being 40% smaller. The size and comfort difference is noticeable for me, but if you have average size to larger fingers is the switch necessary? Probably not. Make sure you are sure on your sizing. I ordered a 9 because that's what I was wearing in series 4, but had to go to a size 10 for the 5 because of how they retooled the contact sensors in the ring, and it was just too tight. I'm not sure if the sizing kit accounts for the way the sensors make contact with your fingers, but just be aware you might have to try a couple different sizes even if you're already in an Oura.