Arch Ring from Jenny Hagen By Arven. The Arch Ring is made of 925S silver and plated with 18 carat gold and was one of the favorites from last year's collection. The organic shape of the ring makes this ring extra special. Arch Ring can be used alone, or stacked together with several of your favorites from the Jenny Hagen by Arven collection. The ring is adjustable and hypoallergenic. Width: 4 mm.