Free easy to use ring sizer.
I can post you this easy to use reusable ring sizer free of charge.
There are instructions provided on the packet but it’s very easy to use. Simply slide the end through the tab with the letters facing outwards and tighten to the size of the ring finger. The ring size tool must comfortably slide on and off over the knuckle. To see the ring size required read the letter shown to the left of the black arrow. The black arrow points to the size. For example the photo shown here shows the finger ring sizer set to a size O.