Measure your bust line
In order to make the bra pattern, the most important part is measuring the bust line. For this, you should hold a measuring tape at one side of your body. Now cross this tape through the centre and reach the other side of the body. After you have noticed this length, you must do the same backwards to take the full measurement of the bust line. Make sure that the measuring tape is in the centre of your bust line, as this will give you an accurate measurement.
Measure cup size
You should measure the cup size as it is also essential for the bra pattern. For this, you must hold down the measurement tape in the middle of your shoulder and bring it down to the bust point. It is important that you do it separately for each breast as both of these are often slightly changed in size.
Take your chest and underbust measurement
Now, you should measure your chest by holding the tape from one arm pit to another. Do not forget to take the underbust measurement the same way you measured the bust line.
Draw larger sections
After the measurement part is complete, you must start drawing the larger patterns of your lingerie. For this, you should draw straight lines using right angles, ruler and a French curve template.
Draw cup size
As you are aware, the cups are in a rounded shape; thus it will be easier for us to draw these. For this, you must take help from something of equivalent circle size and draw it. In order to ensure accuracy, you should use right angle and French curve for each bra cup.
You must keep sketching until you have eliminated all errors and a perfect pattern is drawn.
Test the pattern
You must check your pattern for comfort and accuracy before transforming it into a final product.