By wearing these rings, singles can let others know at a glance that they are unmarried and available for dating, writes Danielle White. Traditionally in Western cultures at least, there are four significant rings; one ring to be friend them, one ring to engage them, one ring to betroth them, and one ring to eternalise them. Well not anymore. In society where people are marrying later and high-rating TV shows such as Sex in the City and Desperate Housewives makes being single sexy, two young Swedish designers have wrung their creative bell and created a fifth ring. Founders of Swedish company Singelringen® have designed a “ring for singeln” – a “single ring” for single people who want others to know at a quick glance they are unmarried and available for dating.