which can look like a specialized measuring tape (like this ring sizer on Amazon) or a bunch of small metal loops on what looks like a key chain (like this finger sizer, also on Amazon).

As the sizing rings use plastic and the actual ring is a metal alloy, there will be slight sizing differences. However, these are largely negligible. Can I exchange my Oura Ring for a different size?

They can also withstand cryogenic conditions and high face-to-face cycling. Metal ring seals are available in a variety of shapes, sizes, and materials. Some are rounded, rectangular, or square.

The Oura Ring is an exception: it’s a health tracker disguised as a metal ring. I wore it for over ... I had to find my ring size. Customers receive a free sizing kit as part of any ring ...

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