Diamond Size Chart

All Cuts of Diamond size chart in MM and Carats

Round Diamonds
Princess Diamond
Cushion Diamond
Oval Diamond
Emerald Diamonds
Pear Diamonds
heart Diamonds
Marquise Diamonds
Asscher Diamonds
Radiant Diamonds

Diamond Size Chart

Diamonds have forever been the reason for happiness and joy, especially for women. The brilliance, shine and sparkle exhibited by a diamond are genuinely magnificent. Diamonds have a history dating back to several years, and they make the perfect fit for all occasions. Therefore, it is essential to know the correct parameters and aspects relevant to the diamond. It will be helpful for us to find the exact diamond according to our preference and desire.

Ancient to the modern form of weight measurement

During ancient times, when ‘carat’ or mm chart for diamonds was not introduced, people used carob pod seeds for weight measurements. It was followed as natural standard units for measuring weight since the seeds were identical.

Later on, there was the introduction of a metric carat chart for precise measurement of diamond size in mm. A decision was taken to finalize the modern diamond carat, which should be equal to two hundred milligrams precisely. The metric diamond size chart in mm has become the universal standard of measurement currently.

Diamonds carat size chart in mm

No person can ever be able to tell precisely whether a particular diamond is larger or smaller without using a scale for measuring. So, precisely a 0.95-carat diamond will not have any major difference when compared to 1 carat diamond in terms of size.

Having a closer look at the diamond’s mm size with the help of a diamond chart in mm would be helpful since the price is directly proportionate to the carat weight of a diamond.

Measurement of diamonds can be done using millimeter as well as carat weight. However, it is advisable to opt for measurement of diamond in mm for loose diamonds and aimed at getting the best deal in an approximate budget.

Importance of diamond size chart mm measurement

Size of diamond in mm is its actual size since carat weight diamonds can have slight faceting differences and might appear larger. There are certain tricks to getting the correct diamond as per your desire.

 In case you wish to own a one which looks more massive, you can opt for a fancy-shaped diamond such as the oval, pears or emerald. It will give you the required sense of elegance as well as you can flaunt a larger looking diamond.

If you are on the lookout of getting a diamond for your existing ring, then go for sizes of diamonds in mm measurement. It will give you the actual size and will fit perfectly to enhance your overall jewelry look.

While purchasing diamond, you need to refer the mm diamond chart. The size of the diamond in mm is always printed on the diamond’s certificate for reference.

Size chart for diamonds in carat size

The actual size of a diamond does not increase as its price. So, when the carat weight of a diamond doubles, it is assumed that the size will also double. However, there is only a very minute change in the diameter and topmost crown area or table of the diamond. 

Based on the cuts and facets of a diamond, it may appear different in size when compared to another diamond having the same carat weight and shape. If observed minutely, it can be noticed that a well-cut diamond and deeply cut diamond have minor differences. 

An appropriately cut diamond might have a lesser carat weight but will appear larger in diameter. It is due to the perfect facets in which its crown part is cut. Similarly, a deeply cut diamond might have a higher carat weight but still appear small. The deep cuts of the diamond contribute to the increased carat weight of the diamond. 

These discrepancies have given rise to the need for mm diamond size charts. Measuring the correct diamond size in mm following the diamonds size chart is the most apt option. Always purchase a diamond based on the diamond size in millimeter proposition.

Carat Diamond chart sizes comparison


  1. Based on size: Generally, longer shaped fancy diamonds tend to appear bigger and broader to the naked eye when compared to a round or square-shaped diamonds of similar carat weight. For instance, shapes such as marquise, emerald, oval or pear would appear larger. It is because the crown part of these shapes is broader compared to a round or square diamonds. 
  2. Based on length and width measurements: The length into width measurements directly correspond to the shape of the diamond. It is a typical phenomenon for a well-cut diamond of a carat weight.
  3. Based on the crown area: The crown area is the actual size of the diamond as how it would appear when viewed from the top. Visually a marquise shape would appear larger than a round shape in its top view. However, it is just a perception and not reality since both shapes have a similar surface area.

Therefore, these are specific points of concern to be noted and be careful about while purchasing diamonds. Considering the diamond size in mm is of utmost importance to eliminate issues in diamond sizes. Diamond chart size in mm surely gives the actual size of the diamond considering all factors and should be adopted rather than carat weight.



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