Oura Ring 4 reviews: 3 things people loved, and 2 things they really didn't
"The Oura Ring 4 is available in six finishes: silver, black, brushed silver, stealth, gold and rose gold. But some finishes cost more than others. While silver and black are available at the $349 (£349, AU$569) starting price, brushed silver and stealth cost $399, and gold and rose gold are $499."