All of the foregoing patterns were designed for a balanced effect, that is, half a pattern to be cut on a fold of fabric. When opened out, the darts will be exactly the same on either side of the center front or back. This is a formal or symmetrical balance (Fig. 18a). It is the one most generally used in clothing design.
Balance can be achieved in another way. The right and left sides may be different though equal. This is a balance of uneven parts, a "felt" balance, and the type most seen in nature. It is called an . . .