What is a Cocktail Ring? To cut the long story short, the cocktail ring is the large over sized ring (not in ring size but otherwise), which was worn at cocktail or dinner parties. Cocktail rings became popular during the 1940s and 1950s. They are still popular and adorn fingers of celebrities & others for both formal & dressy events and occasions like premieres of films, theatre productions, or red carpet award shows like the Oscars OR/and are also worn casually for going out to the pub or cinema or cup of coffee....! Avant garde Gems Diamond Jewellery shop has wide range of unique, one-off cocktail rings, set with genuine gemstones in solid sterling silver and just made of sterling silver too. Breaking news: Their prices are unbeatable too!