In Norse mythology, Draupnir is a gold ring possessed by the god Odin with the ability to multiply itself: Every ninth night, eight new rings 'drip' from Draupnir, each one of the same size and weight as the original.
Draupnir was forged by the dwarven brothers Brokkr and Eitri (or Sindri). Brokkr and Eitri made this ring as one of a set of three gifts which included Mjöllnir and Gullinbursti.
They made these gifts in accordance with a bet Loki made saying that Brokkr and Eitri could not make better gifts than the three made by the Sons of Ivaldi. In the end, Mjöllnir, Thor's hammer, won the contest for Brokkr and Eitri.
The ring was placed by Odin on the funeral pyre of his son Baldr: Odin laid upon the pyre the gold ring called Draupnir; this quality attended it: that every ninth night there fell from it eight gold rings of equal weight
Size guide - How to determine your ring size:
Use a tape or cord, wrap it around your finger and mark the end point.
Simply use a ruler to determine the circumference.
Use the chart below to determine your size.