Wedding Ring

An old Zuzu City tradition... It's used to ask for another farmer's hand in marriage.
Overview
The Wedding Ring is a craftable item used to propose marriage in Multiplayer. Its recipe can be purchased from the Traveling Cart, and the ring is given directly to another player as an engagement proposal. The recipient can choose to accept or refuse it; if accepted, the two players become engaged and the wedding ceremony will normally occur 3 days later. Once an engagement has been accepted, the Wedding Ring cannot be used to marry again.
Like other rings, the Wedding Ring can be equipped, but it grants no stat bonuses. It can also be sold to the Adventurer's Guild, and unlike gifts for villagers, it cannot be given to villagers at all. In addition to its intended marriage use, it can be used in dyeing as a purple dye item at the dye pots in 

A few practical notes make it easy to overlook:
- The Wedding Ring is only relevant for Multiplayer marriage, not for single-player marriage to villagers.
- It does not count toward Crafting Achievements.
- It is not required for Perfection, even in Multiplayer.
- Because it has no combat or utility bonuses, it is generally kept for its proposal function rather than as a regular ring choice.
Official description
An old Zuzu City tradition... It's used to ask for another farmer's hand in marriage.