The Size of a Carat

To choose the best carat weight of diamond, consider her style, the size of her finger, the size of your setting, and your budget.

If you have a set budget, explore all your options and you’ll find that there is a wide range of diamond carat weights and qualities available in your price range.
If your recipient is very active or not used to wearing jewelry, she may find herself bumping or nicking her new ring. Consider a smaller size diamond or a setting that protects a larger diamond from getting knocked against doors and counters.
Also keep in mind that the smaller the finger, the larger the diamond will appear. A 1½-carat diamond solitaire looks much larger on a size 4 finger than a size 8.
Finally, if a large carat weight is important to you, yet you’re working within a budget, consider a diamond with a good cut, SI1–SI2 clarity, and an I or J color grade.