Choosing a laboratory-grown diamond starts with more than simply picking a carat number. Carat weight matters, but shape, measurements, and setting also affect how a laboratory-grown diamond looks when worn. Whether you prefer a traditional round laboratory-grown diamond or are considering an elongated style, understanding the relationship between carat and dimensions gives you more insight into what to expect. At beYon, our laboratory grown diamond size chart can help you compare different styles and proportions based on your personal jewellery preferences. What Does Laboratory Grown Diamond Carat Mean? The laboratory grown diamond carat meaning is simple: carat refers to the weight of a laboratory grown diamond, not its visible dimensions. One carat equals 200 milligrams, and carat weight can also be expressed in points, with 100 points making one carat. Carat is weight — measurements and shape decide how large a stone actually looks. When comparing laboratory grown diamonds, it is useful to remember that carat weight alone does not describe the stone's outline. A diamond's measurements provide additional information about how much surface area it occupies, while its shape determines how that area is distributed. Carat weight is therefore a useful starting point when narrowing down the size of diamond you want, particularly if you already have a preferred carat range in mind. Laboratory Grown Diamond Size Chart: Carat to Measurements A laboratory grown diamond size chart can help you see how carat weight translates into the approximate dimensions of a laboratory grown diamond. The measurement format depends on the shape of the stone. Round, cushion and princess cuts have a more balanced outline, so their size can be represented by a single diameter. Shapes such as oval, pear and emerald have more defined length and width proportions. Length tells you how long the laboratory grown diamond is from end to end, while width shows how broad it is across the stone. Together, these measurements give a clearer idea of how large and elongated — or broad — the laboratory grown diamond will appear when viewed from the top. Diameter-Based Sizes · Round · Cushion · Princess Shape 0.5 ct 1.0 ct 1.5 ct 2.0 ct 3.0 ct Round 5.1 mm 6.4 mm 7.33 mm 8.1 mm 9.4 mm Cushion 4.5 mm 5.7 mm 6.5 mm 7.2 mm 8.2 mm Princess 4.4 mm 5.5 mm 6.3 mm 6.9 mm 7.9 mm ← swipe to see all sizes → Length × Width Sizes · Oval · Pear · Emerald · Radiant · Marquise · Heart Shape 0.5 ct 1.0 ct 1.5 ct 2.0 ct 3.0 ct Oval 6.3 × 4.4 mm 8.0 × 5.6 mm 9.2 × 6.4 mm 10.1 × 7.1 mm 11.5 × 8.1 mm Pear 6.7 × 4.3 mm 8.4 × 5.4 mm 9.6 × 6.2 mm 10.6 × 6.8 mm 12.1 × 7.8 mm Emerald 5.3 × 3.8 mm 6.7 × 4.8 mm 7.7 × 5.5 mm 8.4 × 6.0 mm 9.7 × 6.9 mm Radiant 5.3 × 3.8 mm 6.7 × 4.8 mm 7.7 × 5.5 mm 8.4 × 6.0 mm 9.7 × 6.9 mm Marquise 8.2 × 4.2 mm 10.3 × 5.3 mm 11.8 × 6.1 mm 13.0 × 6.7 mm 14.9 × 7.6 mm Heart 5.5 × 5.1 mm 6.9 × 6.4 mm 7.9 × 7.3 mm 8.7 × 8.1 mm 10.0 × 9.2 mm ← swipe to see all sizes → Disclaimer: These figures are approximate. Actual measurements can vary depending on the proportions and cut of the laboratory grown diamond. When browsing the jewellery collection at beYon, looking at the listed measurements alongside the carat weight can give you a better sense of the laboratory grown diamond's proportions. Understanding Laboratory Grown Diamond Size by Carat Looking at laboratory grown diamond size by carat helps explain why the same carat number can look different from one stone to the next. The reason comes down to shape: a 1-carat round laboratory-grown diamond will have a different outline from a 1-carat oval, pear, or emerald cut, because each shape distributes its weight across a different footprint. Same carat, different footprint — shape is what decides visual size on the finger. An elongated shape may appear longer across the finger, while a round or cushion shape sits more compactly within the same jewellery setting. Your finger size and the proportions of the jewellery design can also influence how the finished piece feels when worn. This is why a carat size that looks striking in one ring design may feel quite different in another. Laboratory Grown Diamond Size vs Carat: What Is the Difference? Understanding laboratory-grown diamond size vs. carat can help you decide how you want your jewellery to look. The size of the centre stone can influence the overall presence of a ring, pendant or pair of earrings, making it an important part of the design choice. A more prominent centre stone can create a stronger focal point, while a smaller stone can give the jewellery a lighter, more understated character. The right choice depends on the style you are drawn to and the visual balance you want from the finished piece. When comparing pieces at beYon, consider how the centre laboratory grown diamond works with the overall design. This can help you choose a piece that feels balanced with your preferred jewellery style and the way you intend to wear it. Laboratory Grown Diamond Carat to MM Chart for Different Shapes A laboratory grown diamond carat-to-mm chart is useful for getting a general idea of how carat weight translates into measurements, but the figures vary by shape. Each cut has its own proportions, so no single measurement applies to every laboratory-grown diamond at a particular carat weight. Some common shapes and how they vary include: Round: A balanced shape with equal height and width. Oval: An extended shape making a longer line. Emerald: A rectangular shape with large step-cut facets. Pear: A distinctive shape combining a rounded end with a pointed tip. Marquise: A long, narrow silhouette with pointed ends. Cushion: A square or rectangular outline with softly rounded corners. If you are buying laboratory grown diamond jewellery at beYon, exploring several shapes at similar carat weights can help you understand how proportions affect the overall look. How to Choose the Right Carat Size Start with the kind of proportions you prefer. If you want the centre laboratory grown diamond to take up more visual space, you may gravitate toward a higher carat weight. In contrast, a smaller centre stone can work beautifully with additional design details. Next, after looking at the carat number, check the actual measurements of the laboratory grown diamond. Using a laboratory grown diamond size chart along with the length and width measurements allows for an accurate assessment of the diamond's dimensions. Your preferred shape should also factor into the decision. A round laboratory-grown diamond offers balanced proportions, while an oval, pear or marquise cut can create a more elongated appearance. Choosing Your Laboratory Grown Diamond Size at beYon Choosing the right carat becomes easier when you look at the complete picture. Carat weight, millimetre measurements, shape, cut, and setting each contribute something different to the final appearance of your jewellery. At beYon, you can use these details to compare laboratory grown diamond styles and identify the proportions that fit your jewellery preferences. Instead of choosing a carat number in isolation, use the measurements and shape as your guide to finding a piece that feels right for your collection. FAQs Q1. What is the difference between carat and size? The weight of laboratory grown diamonds is known as carat, whereas size usually denotes their physical dimensions. Both aspects help provide insight into their dimensions. Q2. Does a higher carat always mean a larger-looking laboratory grown diamond? Not necessarily. The shape, cut, and proportions of a laboratory grown diamond can affect its length, width, and overall appearance, even at a higher carat weight. Q3. How can I use a diamond size chart when choosing a laboratory grown diamond? A laboratory grown diamond size chart can help you compare approximate carat weights with measurements. Use it alongside the listed length and width of the laboratory grown diamond for a more accurate idea of its proportions. Q4. What should I consider besides carat weight? Consider the laboratory grown diamond's shape, cut, measurements, and setting. When exploring jewellery at beYon, looking at these details together can help you choose a size and design that suits your preferred style.