Abstract: A self sizing adjustable jewelry ring includes a shank member configured to encircle a substantial portion of the finger and to be open on one side. A bridge member is permanently connected to the shank member but permits a movement relative to the shank member as it extends across the open side. One of the shank member and the bridge member has a pair of slots for respectively receiving a portion of the other member to prevent their separation. The shank member and the bridge member are dimensioned to provide a spring force between them wherein the bridge member can be moved relative to the shank member to adjust for the size of the user's finger.