Three stone white gold diamond ring on its side with a reflection.

Carat Weight

Photo of a diamond on its site

The weight or size of a diamond is measured in carats. A carat is 0.2 grams and there are 100 points (or 200 milligrams) per carat. 25 points (.25ct) is 1/4 carat in weight - 50 points (.50ct) is 1/2 carat.