Carat is the internationally used measure unit, which determines the weight of a diamond, giving us at the same time an indication of its size. One carat equals 1/5 of a gram and is divided in 100 cents. Thus a 25 cents diamond equals 1/4 of a carat or 0,25 carats. In the following table, you can see the approximate proportion between carats.
Attention! The sizes of the images above are indicative, so please consider the millimeter base.