A 0.25 ct. or larger center stone of any shape can be set with this ring. Fine Jewelry Solitaire Signet Ring With Open Shape, Fine Jewelry Open Ring Signet With Solitaire, Fine Jewelry Signet Ring With Solitaire In Open Style, Prong Set Open Signet Ring For Promise, Open Signet Ring With Prong Setting As Promise Ring, Open Ring Signet Ring With Prong Setting For Promise, Modern Open Ring With Diamond Cut, Classic White Gold Initial Ring With Diamond Cut, Modern Sterling Silver Rings For Promise