Odin, the Norse God who sacrificed an eye for wisdom relied on two ravens; Huginn and Muninn. Their names mean ‘thought’ and ‘memory’, or mind. Through his raven messengers, Odin kept informed of all that happened in the entire world.
Stainless steel is hypoallergenic, so it won't rust, tarnish, or cause any sort of discoloration.
The Guardian Ring is available is sizes from 7 to 15.