Selecting the right size diamond stud earrings for everyday wear is a tricky task. Smaller stones are a more subtle, understated choice, bigger ones on the other hand, while more noticeable may be overpowering and too flashy. To pick the ideal size to match your personal style, it is important to understand carat weight. Carat weight is used to measure the size of a diamond and is directly correlated with its price. In other words, larger diamonds are more expensive than smaller ones.

Understanding Carat Weight

Carat weight (or ct or ctw) is the standard unit used to measure gemstones and diamonds. It is however not commonly used in everyday life and therefore not always understood intuitively. To give you an idea, for diamond shapes that are geometrically equidistant, such as round and square diamonds, one carat equals approximately 5.5 - 6.5mm (diameter). The most common carat weights for diamond stud earrings range from 0.25ct (small) to up to 1.5ct (large). 

Generally speaking, a 0.25ct diamond is considered very small or petite, a 0.50ct stone is considered medium-sized; and 1ct stones are considered sizable. Everything above 1ct is quite large and showy.

The image below shows our Fiona Six Prong Round Studs in different carat sizes.

Stud Earring Different Carat Size Comparison

When considering the carat size, it is important to pay attention to whether you are looking at the “total carat weight”, so the combined carat weight of both earrings, or the the carat weight per earring. At CARAT* LONDON we will indicate this very clearly on our product detail pages (i.e. “The model wears 1.50ct. equivalent stone.”) and in addition to that there will be plenty of photos showing you exactly how big a stone is.

Which Carat Weight is Most Popular for Diamond Earrings?

While it is an individual choice to pick the perfect carat weight, overall 1ct weight is the most popular weight option for diamond earrings in the UK. Research from Google underpins that: on average, in 2022 the number of Brits searching for “1ct diamond earrings” on Google UK exceeded those searching for a “2ct diamond earring” by a factor of 3x. Interestingly: during the festive season in December the interest in larger carat sizes increases even more and the number of search queries for “1ct diamond earrings” is twice as high as during an average month.

This shows, more understated stone sizes, such as a 0.50ct stone is everyday wear, whereas larger stones are a better fit for the festive season, or for more formal occasions such as weddings or parties. Larger stones are often seen as statement pieces and can add an impressive sparkle to any special event or night out.

How Does Carat Weight Affect Diamond Earring Cost?

As mentioned above, carat weight is used to measure the size of a diamond and is therefore directly proportional to its price. When determining which size of stud earring is right for you, it is important to consider your budget as well as your desired look. At CARAT LONDON*, all our diamond stud earrings are made with lab grown diamonds. Lab created diamonds are physically, chemically, and optically identical to mined diamonds.They however have a much shorter supply chain and do not need to be mined. As a result, at a similar grade, they are up to 50 percent less expensive than mined counterparts - while being more sustainable and 100% conflict-free. Browse our lab made diamond earrings and find the best pair for yourself!


Recap: Select the Carat Size that is Right For You

In conclusion, carat weight is an important factor to consider when selecting the perfect pair of diamond stud earrings. Depending on your budget and desired look, different sizes of diamonds may be more suitable for everyday wear and special events. It is essential to research cut, clarity and colour ratings prior to making a purchase. You may also want to wear a combination of different earrings. Read our earring stacking guide to find how to best stack multiple earrings.



What is a carat weight in diamond earrings?
Carat weight refers to the weight of the diamond or gemstone in your stud earrings and is a key factor in determining size and price.

How does carat weight relate to the size of a diamond stud?
Typically, a one-carat diamond will have a diameter of about 6.5mm. Carat weight directly correlates with the physical size of the diamond.

How does carat weight affect the price of diamond stud earrings?
The larger the carat weight, the higher the price. This is because larger diamonds or gemstones are rarer / more costly and in thus in higher demand.

How do I choose the right carat weight for my diamond studs?
While larger studs can be worn daily, they are often more suitable for special occasions due to their size and impact.

What are the most common carat weights for everyday diamond studs?
Diamond studs for everyday wear are commonly found in sizes ranging from 0.25ct to 1ct per earring.

Are larger carat diamond studs suitable for everyday wear?
For formal attire, choose ornate or statement drop earrings. For casual outfits, smaller, simpler drop earrings are ideal.

What is the best carat weight for diamond earrings for the office?
For a professional setting, modest-sized diamond studs between 0.25ct to 0.50ct are ideal as they are noticeable yet understated.

Are there affordable options for large carat diamond studs?
Yes, consider lab-grown diamonds or stones for larger carat sizes at a more accessible price point. All our Gentle Diamonds stud earrings are made from lab-grown diamonds.

How do I maintain my diamond stud earrings?
Regular cleaning with a soft brush and mild soap, and annual check-ups with a jeweler can keep your diamond studs sparkling.

What should I consider apart from carat weight when choosing diamond studs?
Look at the cut, color, and clarity of the diamonds. These factors also heavily influence the appearance and brilliance of the earrings.