Yes, the Oura Ring 5 is noticeably smaller

From top to bottom: Oura Ring 5, Oura Ring 4 in ceramic, Oura Ring 4 regular, and Oura Ring Gen 3.

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 …
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