In this introduction to size grading in fashion, we’ll take a look at size grading, why it’s important, and how it’s done:
What is Size Grading in Fashion?
Have you ever wondered how clothing companies manage to mass-produce garments in a variety of sizes? The process is called size grading, and it’s a vital part of the fashion industry.

Size grading in fashion is the process of creating different sizes of a garment based on a master pattern. This is typically done by making small adjustments to the pattern, such as changing the width of a sleeve or the length of a hem.
By creating a range of sizes from a single master pattern, manufacturers can save time and money while still delivering a consistent product.
Why is Size Grading Important?
Size grading in fashion is important because it allows clothing companies to produce garments in a range of sizes with consistency. This is essential for two reasons:
- First, it ensures that garments will fit customers properly.
- Second, it helps to prevent manufacturing defects.

How is Size Grading Done?
There are two main methods of size grading: computer-aided design (CAD) and manual grading.
- CAD size grading is the more popular of the two methods. It involves using software to create a pattern that can be adjusted to different sizes. This method is faster and more accurate than manual grading, which is why it’s the preferred method among most fashion companies. However, it does require a significant investment in CAD equipment and software.
- Manual size grading is the traditional method of size grading. It involves making alterations to an existing pattern by hand to create different sizes. This method is time-consuming and less accurate than CAD size grading, but it doesn’t require any special equipment or software.

How to Grade Your Garments
When it comes to size grading, there are two main methods: flat pattern grading and block pattern grading. Let’s take a look at each one in more detail:
Flat Pattern Grading: This method involves making small changes to an existing 2D pattern. For example, you might adjust the width of a sleeve or the length of a skirt. This method is relatively quick and easy, which makes it ideal for small businesses or businesses with limited resources. However, it’s important to note that flat pattern grading can only be used for certain types of garments.
Block Pattern Grading: This method involves starting with a basic 3D block template. From there, you’ll make changes to create different sizes. For example, you might make the waistline narrower or the sleeves longer. This method is more time-consuming and requires more resources than flat pattern grading. However, it’s much more versatile—you can use it to grade almost any type of garment.

Size grading is an essential part of mass production in the fashion industry. By taking the time to grade your garments, you can be sure that they will fit a wide range of body types—which is crucial for ensuring customer satisfaction. There are two main methods for size grading: flat pattern grading and block pattern grading. Which one you use will depend on your specific needs and resources. However, no matter which method you choose, taking the time to grade your garments will pay off in the long run!
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