The Invisible Ring Size Adjuster by Feramox is a transparent TPU silicone sizer designed for women. It comes with 8 pieces and is suitable for sizing loose rings. The product, manufactured by Freeman Direct, is lightweight at 0.49 ounces and has a compact package dimension of 4.37 x 2.87 x 0.47 inches. The ring size adjuster is perfect for achieving a comfortable fit for your rings and can be easily used to make your rings the perfect size for your fingers.