ZDNET's editorial team writes on behalf of you, our reader. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. If we have made an error or published misleading information, we will correct or clarify the article. If you see inaccuracies in our content, please report the mistake via this form.

Oura's next big smart ring is its smallest yet. The company unveiled its Oura Ring 5 on Thursday, and the smart ring maker completely redesigned this fifth-gen device to be smaller, thinner, and more comfortable than its predecessors. Starting at $399, the Oura Ring 5 is $50 more than the Ring 4 but comes with some worthwhile upgrades.

Also: Whoop vs. Fitbit Air: I've tested both trackers for health and fitness, and this model wins

The Ring 5 arrives two years after the company unveiled its Oura Ring 4, a capable but chunky smart ring. Ring 5 is 40% smaller than Ring 4 -- taking up less space around the finger and delivering a more comfortable fit. But is it worth the upgrade? I break down why you'd want to opt for Oura Ring 5 or stick with Oura Ring 4.