Here is a selection of charts showing the Carat Weights of Diamond corresponding to their sizes. These are indicative only, as every diamond is cut slightly different and so will vary from these guide sizes.
Also, other gemstones, having different specific gravities, will weight more or less than diamond for the same sizes, so these charts will not be appropriate for those.
Measuring a finger size for a ring can be surprisingly complex. Below we highlight some of the common issues that arise and provide a chart of some of the more common international sizing systems.
Many countries and regions use their own ring size chart. Here is a list of some of them. These are approximate comparisons as many of the sizes from one region have no exact corresponding size from another - however, the differences will be very minor.
