Oura Ring 5 review: Thinner, lighter, better

Key points

• 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 thick compared to the Ring 4’s 2.88 mm.
• Although the exact weight depends on your ring size, the Ring 5 weighs between 2 grams and 2.69 grams, while the Ring 4 weighs between 3.3 grams and 5.2 grams.
• I found that these changes dramatically improve the ring’s comfort, and also make it more aesthetically pleasing...