Yes, the Oura Ring 5 is noticeably smaller

This is not an Oura Ring 5 review. That’s coming later, once I’ve had enough time to really test the new durability and battery life claims, plus the new software updates that start rolling out today. In the meantime, I did want to provide an answer to a burning question that I’ve seen asked in many Oura Ring comment sections across the internet. Yes, it is smaller and lighter than the Oura Ring 4 . And for impatient folks considering upgrades, I come bearing photographic size comparisons to the Oura Ring 4 — regular and ceramic versions — plus the Oura Ring Gen 3. A note: Sizing matters a lot with smart rings . Not only do smart ring makers not follow standard ring sizing, but a bad fit might mean inaccurate data or a lost ring. Because of the smaller design, Oura has updated its sizing kit yet again. Even if it’s a hassle, even if you think you already know your Oura Ring size, I highly recommend getting the sizing kit. For example, I went from a size 8 in the Gen 3 to a size 9 in the Oura Ring 4. And while a size 9 is still the best size for me in the Oura Ring 5, it’s a more snug fit. If your finger is generally a “between” size, you’ll want to see how a tester kit works for at least 24 to 48 hours, since fingers can swell and shrink with temperature changes. Take it from me: Measure your smart ring size twice, buy once. If you have any more questions about the Oura Ring 5, feel free to leave them in the comments. …