A simple way to temporarily size your ring down to fit you. Easily slips over the shank of your ring (see the 4th photo). There are seven sizes of RING NOODLE ring guards: Mini - fits rings that are 0.5-2.0mm wide - reduces ring size by 0.5 - 1.0 size. Petite - fits rings that are 1.0-2.5mm wide - reduces ring size by 0.5 - 1.0 size. Narrow - fits rings that are 1.0-2.5mm wide - reduces ring size by 1.0 - 2.5 sizes. Medium - fits rings that are 2-4.5mm wide - reduces ring size by 1.0 - 2.5 sizes. Wide - fits rings that are 4.0-6.0mm wide - reduces ring size by 1.0 - 2.5 sizes. Extra Wide - fits rings that are 6.0-7.5mm wide - reduces ring size by 1.0 - 2.5 sizes. Super Wide - fits rings that are 7.5-9.0mm wide - reduces ring size by 1.0 - 2.5 sizes. Can easily be cut shorter for less size reduction. See the second photo to see how it is installed. No tools needed! Simply slip the cut side if the RING NOODLE over the outside of the shank and turn it as you push it on so that the seam ends up on the outside. Will not damage your ring like a metal ring guard. This ring adjuster is made of food/medical grade vinyl tubing for long lasting flexibility. Hypoallergenic. RING NOODLES can be shortened if they make your ring too snug. RING NOODLES are available in 7 sizes to accommodate the width of your ring. Easy to use (no tools needed for this ring size reducer) Can easily be cut shorter for less size reduction. Comfortable do to curved shape and hypoallergenic (medical grade vinyl) Kind to your ring! (does not scratch gold or silver) Costs far less than a full ring sizing