There are actually several different ring-sizing options. Here are five of them:
(1) FingerMate Shank
(2) Horseshoe Ring Guard
(3) Speed Bumps
(4) Stirrup Shaped Ring
(5) Regular Simple Ring Sizing
(1) The FingerMate Shank works extremely well for those who may have a 2-3 size difference between the knuckle and finger itself. The ring will nicely hug your finger yet give you the ability to easily glide it over your knuckle because it opens to go over the knuckle and then closes and locks securely to snugly fit your finger for a safe and comfortable fit. To open the FingerMate hinged, expandable, ring shank, one simply grasps the top of the ring and pulls up ... No more twisting and turning and no more forcing rings on and off, which irritates the knuckles even further. These shanks are available in a wide variety of widths and styles in 14k Yellow Gold, 14k White Gold or Platinum, to replace the conventional shank of almost any ring. The hinged ring is easy to put on, comfortable while worn, and easy to remove.
(2) The Horseshoe Ring Guard is a Gold Spring Insert and works well for people with thin fingers who need rings large enough to fit over their knuckles and assist in keeping rings upright on fingers in order to stop their rings from slipping. Over the years, Jewellers have developed several devices that "take up space" to compensate for the discrepancy between the diameter of the knuckle and that of the thin finger. This process is affordable and simple to install.
(3) Speed Bumps is another possible solution to Ring Spin or Ring Flop. Putting up with rings twirling and flopping over to the side is uncomfortable and not a good look. Rings that have to be a full size or two larger to fit over your knuckle tend to become prime candidates to be left unworn in your jewellery box, which makes it more susceptible to theft. Speed bumps are raised domes soldered onto the inside shank of rings. They help anchor your ring to the muscle area of your finger and help prevent it from spinning. Speed bumps are good for top heavy rings that have a tendency to fall over and also help on rings with thin shanks, where there's not much there to help hold the ring upright.
(4) The Stirrup Shaped Ring is basically created from the existing ring shank to give the ring a stirrup shape which hugs the finger and prevents it from turning, as this shape has a flatter base. Generally-speaking, our fingers are not a perfect circular shape; however, more of a 'soft square'; hence, this shape tends to fit a finger better.
(5) Simple Ring Sizing requires cutting and soldering of the ring. To enlarge the ring, it is necessary to add more of the same precious metal. To make it smaller, it is necessary to remove a small amount of the metal and then bind it back with the same quality and colour of the existing metal.
Just as there are many body shapes, there are many finger shapes. Knowing what finger type you have will help determine the styles of rings that best suit you.
When purchasing rings, it is also a good idea to keep in mind that our bodies fluctuate with hot and cold temperatures, which makes individual finger sizes increase/decrease throughout the day.
Contact your Professional Jeweller to learn more about your finger shape and the various choices you have that may help you wear your ring more successfully, comfortably and beautifully.