Carat (ct.) Size guide

The diamond Carat is the international unit of weight, used for measuring diamonds and gemstones. 1 carat is equal to 200 milligrams, or 0.2 grams.

Most people would think that buying a diamond is all about the diamond carat size, this is evident when showing off the ring people immediately ask what carat is the diamond.

Ideally anything above 0.5 of a Carat is going to stand out, however it is essential that you don’t compromise on the Cut, Clarity and Colour in order to buy a bigger diamond with no sparkle or wow factor.







  1. Bryan Lopez March 14, 2016 at 2:56 pm Reply

    Hello, you just talk about the Cut ​of a Diamond, I have always be confused by that, the price of a Diamond depends on how its cut​? Why? If I am searching for a Diamond ring I have to take into consideration the size of the diamond and the cut​ of the ring?

    • Naeem March 14, 2016 at 3:07 pm Reply

      HI Bryan,

      Thank you for your question, The Cut is very important when buying a diamond ring. Depending on the way in which the diamond has been cut, this basically lets in the light to the diamond and then bounces back out. Which is what gives the diamond its sparkle! Therefore the cut is probably the most important thing if you want your diamond to sparkle that is! I wouldn’t recommend anything less then 0.5 of a carat if you want the diamond to stand out on the ring. You also have to take into consideration the Colour of the diamond and also the clarity. Have a look at my page The 4 C’S which gives a good explantion of each with the diagrams. Let me know if you have any more questions.

      Many Thanks Naeem.

  2. Gideon March 24, 2016 at 9:58 am Reply

    Great name for the site! I’ve been with my girlfriend for a number of years. Not planning on doing anything to drastic anytime soon but now I can finally say that I know a little something about engagement rings. She cant complain to much so an 0.5 should do the trick when the time comes. Much appreciated!

    • Naeem March 24, 2016 at 10:48 am Reply

      Hi Gideon, glad you like the website. If you want the diamond to have a wow factor I would not recommend anything less than 0.5 of a carat, but also don’t forget about the cut of the diamond which gives the diamond its sparkle along with the colour and clarity. When buying a diamond all of the 4 c’s have to be taken into consideration. Many thanks Naeem

  3. Jdoo March 29, 2016 at 12:28 pm Reply

    This is exactly what I was looking for. I’m actually already engaged, but I was very poor at the time of engagement.

    Now that we are better off, I want to make up for a cheap engagement ring with a nice wedding ring. I was thinking of going for something with several low carat diamonds displayed around white gold.

    Can you recommend something for me or someone who does custom designs?

    • Naeem March 29, 2016 at 1:21 pm Reply

      Hi Jdoo,

      I am glad you came across our website, if you go to the create your own ring page. This will take you to Blue Nile’s custom ring page. You can select a setting and then select the exact diamond you want set. They have a wide variety on offer, From solitaire engagement rings to Wedding bands! Please feel free to message me if you need any help selecting the perfect diamond ring.

      Many Thanks,


  4. ryan March 30, 2016 at 8:25 am Reply

    hey naeem, i really appreciate the carat size guide. i’m actually in that phase with my lady where were starting to look at rings. this really helps. do you have a recommendation for what makes a good size engagement ring when on a tighter budget, but still getting that wow factor?

    • Naeem March 30, 2016 at 9:55 am Reply

      Hi Ryan,

      Thank you for your comment! If you really want your diamond to have a wow factor then I wouldn’t go for anything less the 0.5 of a carat. This is will make the diamond stand out making it the centre of attention. Also more importantly The Cut should be an Ideal Cut, this is what lets in the light and gives the diamond its sparkle. The Colour I wouldn’t go for anything less then a F-G for value for money and lastly Clarity, this is how many imperfections the diamond has, Nothing less then a VS2 if you really want the best quality diamond for your money. All of this with a classic solitaire setting should come in at a price very good value for money.

      Many Thanks,


  5. Mijareze March 30, 2016 at 9:17 am Reply

    I read your post titled, “Diamond Carat Size.” You are right about diamonds. The first thing people ask is the size of the diamond. I was into jewelry once upon a time and I remember reading about clarity. Some diamonds have a lot of dark spots, flaws. I had a 1 carat diamond ring that was set in a gold nugget style setting. Later in life I sold all of my jewelry and now I wear simple silver jewelry. Thank you for clarifying the weight 0.2 grams for a carat for me.
    Edward Mijarez

    • Naeem March 30, 2016 at 10:04 am Reply

      Hi Mijareze,

      Thank you for your comment, “Diamond Carat Size” is all people care about, I was one of these people until i did my research on what the 4 C’s were. I am lucky I did, otherwise my fiancé would have ended up with a very poor quality diamond! The reason i created this website was to educate others on what to look for when buying the perfect diamond ring! I am glad you liked post! Keep in touch and if you every need to buy a diamond ring and need inspiration, let me know.

      Many Thanks,


  6. Alyssa March 30, 2016 at 9:20 am Reply

    Hi Naeem,
    Yes, some people love to talk about carat sizes, but the cut, clarity and colour all play into the quality (and thusly the price) of the diamond. It all depends on what you want, really. We got my diamond off of Craigslist! Yikes! But we did get the diamond’s papers from the seller and we took it to a diamond store for independent verification of colour, clarity, cut and carat. Designing my own ring from Blue Nile is a reward I’ve promised myself for attaining a very important goal. I love Blue Nile and can’t wait to custom design my own diamond ring.
    This is a great article to help people understand that a diamond is more than its carat!

    • Naeem March 30, 2016 at 9:59 am Reply

      Hi Alyssa,

      Thank you for your comment! You seem to know your stuff when it comes to Diamonds! If you ever need help selecting the perfect diamond ring, I may be able to give you some inspirations. Keep in touch! Many Thanks,


  7. Paula March 30, 2016 at 11:58 am Reply

    Hi there, well this clarifies a lot for me. I never understood the whole thing about carats and cuts etc.
    Is it true that there should be a hole placed behind the diamond in the ring to allow to light shine through it and to improve the clarity? I know nothing about such things but I did hear this.

    • Naeem March 30, 2016 at 12:26 pm Reply

      Hi Paula, Thank you for your comment! There are different types of settings which allow the light to reflect in the diamond to really give it that sparkle. The most important thing if you want the diamond to really sparkle is the Cut! The way the diamond has been cut allows the light to come in and bounce back out giving the diamond its sparkle! Thanks Naeem!

  8. Shalei March 30, 2016 at 12:10 pm Reply

    In a nutshell great explaination. I was curious as to why you are doing this. So I went to the about me page to. How awesome is that story! I loved the pictures and that ring was perfect. It fit her style. It was dainty and elegant. From the look of the photo and her reaction I know she loved it. Thank you for allowing me a small peak into your life and for educating me on a girls best friend!! 🙂

    • Naeem March 30, 2016 at 12:22 pm Reply

      Hi Shalei,

      Thank you for your comment! Yes she did love it and for her it was the perfect diamond ring! The reason I crested this website is to educate others guys on what to look for when buying the perfect diamond! so there Fiancé’s can have the same reaction mine did! I am glad you liked my website! Many Thanks Naeem

  9. Simon May 11, 2016 at 11:16 am Reply

    Hi Naeem,

    Thanks for the short article that explained how you compare the diamonds based on carat. I see that you also wrote about cut and clarity. Can you explain how does it work? It means if I buy 0,5 carat it needs to be cut after that so it will lose the weight? Or 0,5 is after processing?

    • Naeem May 11, 2016 at 11:49 am Reply

      Hi Simon,

      There are four elements to consider when purchasing the perfect diamond. in terms of importance, I would consider buying the diamond based on the 4 following four factors in this order. The cut is the most important, how well the diamond is cut will show in its sparkle. The cut of the diamond lets light into the diamond which bounces back out and gives it a sparkle. Colour if you want the diamond to be clear, consider the colour as you don’t want a yellowish looking diamond. Thirdly clarity , this is how many blemishes the diamond has on it, some can be seen with the naked eye, therefore, you need to consider this. Lastly is the carat which is how much the diamond weighs! also reflects the size of the diamond. But there is no point having a diamond which is of a very low quality.

      Many Thanks Naeem

  10. Makki June 27, 2016 at 10:38 pm Reply

    This is a great topic. I strongly feel jewelry shoppers should be well versed in the 4 Cs. Since my uncle owns a jewelry shop, I’ve gotten used to diamond terminology, but that was due to circumstance. This guide you’ve written can go a long way to helping people shop for diamonds. Good work Naeem!

    • Naeem June 28, 2016 at 8:57 am Reply

      Thank you Makki, I’m glad you like my content!

  11. Melanie February 26, 2017 at 1:15 am Reply

    Thank you very much for a very informative article. I have to admit I no nothing about this subject, however knowing this information might save me one day. Yes it does seem a lot of people put more emphasis about the carat more than anything else. I would have probably done the same too before you educated me.

    • Naeem February 26, 2017 at 4:33 am Reply

      thanks Melanie

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