What is CTW? Understanding Carat Total Weight for Diamond Stud Earrings

If you've ever shopped for diamond stud earrings, you’ve likely noticed the acronym CTW listed right next to the size. This term is key to understanding what you're buying, but it's also the source of the most confusion for first-time buyers.

At Nolita Diamonds, we believe informed shopping is the best way to find your perfect pair. Here is a comprehensive breakdown of what Carat Total Weight (CTW) means, why it matters, and how to choose the right CTW for your style.

CTW: Weight vs. Visual Size

First, let’s clear up the biggest misconception: Carat is a unit of weight, not a unit of size.

• Carat (CT): This measures the weight of a single diamond. One carat is equal to 200 milligrams (or 0.2 grams.)

• Carat Total Weight (CTW) or Total Carat Weight (TCW): This is the combined weight of all the diamonds in a single piece of jewelry. For a simple pair of stud earrings, the CTW is the sum of the weight of the two diamonds.

The Key takeaway for studs: If you see a pair of earrings labeled 1.00 CTW, it means each individual diamond stud is approximately 0.50 carats. If you see a 2.00 CTW pair, each stud is a full 1.00 carat. Always remember to divide the CTW by two to know the size of the diamond sitting on each ear!

How CTW Translates to a Visual Look on the Ear

While CTW is a measure of weight, it directly impacts the diameter or millimeter (mm) size of the diamond you see. Choosing the right CTW is all about finding the size that complements your face shape and lifestyle.

The Everyday & Minimalist Sparkle (Up to 1.00 CTW)

A 0.50 CTW pair offers a light, subtle sparkle. It's perfect for daily wear, professional settings, or for complementing a multi-piercing look without overwhelming the ear.

The 1.00 CTW pair is the classic, most popular size. It hits a balanced sweet spot—large enough to be noticed and provide brilliant fire, yet comfortable and appropriate for any occasion. For many, this is the benchmark for the ultimate signature stud.

The Statement & Luxury Look (1.50 CTW and Above)

A 1.50 CTW pair is a noticeable upgrade in presence. The diamonds cover more of the earlobe, creating a bold, eye-catching look that works beautifully for both daily wear and special events.

A 2.00 CTW pair is where luxury meets glamour. These diamonds command attention and make a definitive statement. They are often chosen for major milestones or for those who simply want maximum brilliance.

Maximizing Your CTW: Natural vs. Lab Grown

At Nolita Diamonds, we understand that buyers have different priorities when it comes to weight and budget. We proudly offer both Natural Diamonds and a separate collection of Lab Grown Diamonds to help you strategically choose your desired CTW.

When to Choose Natural Diamonds

Choose Natural Diamond Studs if you prioritize the traditional rarity and long-term rarity of a diamond formed by the earth, as well as the legacy associated with mined diamonds.

When to Choose Lab Grown Diamonds

If you prioritize maximizing visual size for your budget, our dedicated Lab Grown Collection offers you a significant advantage. Because they are created in a controlled environment, you can often secure a much higher CTW, such as upgrading from a 1.00 CTW natural pair to a 1.50 CTW lab grown pair, for a similar price.

Final Pro Tip: Look Beyond the Weight

While the CTW is the first number that draws attention, remember that a diamond’s brilliance is determined by its Cut. A poorly cut 1.00 CTW diamond can appear dull and smaller than a masterfully cut 0.75 CTW diamond.

Always prioritize the Cut quality along with the carat weight to ensure you’re getting the most sparkle for every millimeter of diamond you purchase. Our studs are expertly set in secure 14K Gold settings designed to maximize light return, making every CTW shine its brightest.

Ready to find the perfect CTW for your style? Explore our collection of classic Natural Diamond Studs and high-value Lab Grown Diamond Studs today.