When this becomes a reality, you won't need a sizing kit to find the best size for your finger. Basically, this could be achieved by an elastic material present in the internal structure of the smart ...
I've worn the all-new Oura Ring 4, and it has several big hardware changes over the last Oura Ring. This is what it's like to a longtime Oura Ring wearer.
While sizes range from 5 to 13, you may not be able to find a suitable size for you at a similar discount, though this particular ring does come with a sizing kit. For other larger sizes ...