Tungsten rings can't be sized because of its hardness, so when selecting a tungsten ring be sure to get a very accurate measurement of your finger. Tungsten rings cannot be cut of the finger however, they can be broken of with vise grips. Although this sounds dangerous, it really isn't when performed by someone familiar with the metal. Tungsten is very hard and therefore also very brittle, this brittleness allows the metal to be broken in place of being cut off.