A sovereign ring is a ring

Ring (finger)

A finger ring is a circular band worn as a type of ornamental jewelry around a finger; it is the most common current meaning of the word ring. Other types of metal bands worn as ornaments are also called rings, such as arm rings and neck rings....

 which typically has a gold sovereign as a primary decorative feature, with the obverse face as the visible detail. The coin may be either genuine or replica tender, and may be either a sovereign or half sovereign. In the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 it is also common to use custom coinage bearing such motifs as the 'Three Lions

Coat of arms of England

In heraldry, the Royal Arms of England is a coat of arms symbolising England and its monarchs. Its blazon is Gules three lions passant guardant in pale Or armed and langued Azure, meaning three identical gold lions with blue tongues and claws, walking and facing the observer, arranged in a column...

', or other similar imagery as Saint George

Saint George

Saint George was, according to tradition, a Roman soldier from Syria Palaestina and a priest in the Guard of Diocletian, who is venerated as a Christian martyr. In hagiography Saint George is one of the most venerated saints in the Catholic , Anglican, Eastern Orthodox, and the Oriental Orthodox...

, or a Welsh Dragon.

English female rapper Lady Sovereign

Lady Sovereign

Louise Amanda Harman , better known by the stage name Lady Sovereign, is an English rapper & grime artist. She is noted for her professional success in performing styles of music generally dominated by males...

is known for wearing a sovereign ring, which is why she adopted the name Lady Sovereign.