Ring Size Adjuster for Loose Rings,12 Pack, 2 Sizes ONLY $5.93 & FREE Shipping on orders over $25.00 shipped by Amazon. Plus FREE Returns! FIT 90% OF RINGS and EASY TO USE – Come in 2 sizes: (6 pcs) ø2mm X 10cm coil is best for thin rings that are less than 3mm in thickness and the (6 pcs) ø3mm X 10cm flat coils are best for rings up to 5mm in thickness. This Ring Size Adjuster will make your ring smaller without resizing. Moreover, it fits both women and men’s rings. Whatever you do your ring fits perfectly and there is no chance to lose your valuable jewelry down the drain or in the great outdoors.