1. Adjust the ruler according to the actual size and fix it at the position to be measured.

2. Expand according to specific needs. For example, when cutting, we need to pay attention to avoid wasting materials, and at the same time we need to consider the actual effect and comfort of clothing.

3. Determine datum points and datum lines, such as bust line and bust width line.

4. According to the design drawing, push each point horizontally by corresponding length, for example, push point E horizontally 1/2 shoulder difference =0.6, and don't move vertically.

5. Extend each point vertically according to the design drawing. For example, point D is extrapolated horizontally to 1-0.6=0.4 and kept vertical.

6. Connect the points according to the design drawing, and draw the armhole arc, front collar arc, etc.

The above information is for reference only. If in doubt, please consult a professional.