When I first opened the box the Oura Ring 5 comes in, my first thought was, “Wow, that’s tiny.” My second thought was that this is a smart ring a lot of people have been waiting for. As someone who got quite used to wearing the Oura Ring 4 Ceramic , I was surprised how noticeably smaller and lighter the new Ring 5 is. The Ring 5, which Oura describes as the world’s smallest smart ring, is 40% smaller than its predecessor, measuring 6.09 mm wide compared to the Ring 4’s 7.90 mm, and 2.28 mm thic…
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