RingSlinky Ring Guard / Ring Size Reducer (3 Pack) RingSlinkys come 3 per package, and are available in 6 sizes based on ring's width. Easy to use, no tools need. Made of coiled nylon for flexibility, durability, and comfort. Can be shortened to decrease the amount of size reduction. Easy to use, no tools needed. Great for people with arthritic knuckles. A good fit on your ring makes a big difference in how well RingSlinkys work and feel. Choose the size that is slightly smaller than the the width of your ring.