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What is grading?

Grading is the adjustment of a pattern to larger or smaller sizes using grade rules. When creating a garment, a pattern is first created in the sample size, also known as the initial size. Grading uses grade rules to enlarge or reduce the pattern from this size to fit the different sizes.

The grade rules are derived from a grade point in the positive or negative X and Y directions. The calculation formulas differ depending on the size system, whether grading is manual or computer aided (CAD), and which system is used.

Grading trousers by grade rules

By taking serial measurements in different countries, standardized size tables are created based on average body sizes and proportions typical for each country. This enables the apparel industry to offer garments with the right measurements for each country. This ensures the quality and fit of the garment. Examples of these standard sizes are SIZE GERMANY, SIZE ITALY, SIZE NETHERLANDS and SIZE USA.