Sizing Ring Guard Jeweler style sizing ring guard is a new way to reduce the size of your ring! Gold Tonefilled sizing ring guard has no springs, wires, or exposed seams. Small, thin ring size reducer slides inside your ring and bends to stay in place. To use, just lay the long edge of the ring guard across the bottom of your ring. Then carefully bend ends of prongs around the ring for an adjustable fit. Shop our entire collection of jewelry solutions today!