The ring is extending its reach, with recent launches from Cartier to Hermès seeing the jewellery staple stretch across two, three and even four fingers. “A double-finger ring naturally changes the way a hand looks,” says Milka Karaagacli, founder and creative director of the fine jewellery label Kismet by Milka. “It feels stronger and more defined.” The finger-spanning style has a long history, its current trendiness notwithstanding. Multi-finger rings were worn in ancient Egypt, where they...