In relation to the selvage, how should the lengthwise grain line be oriented?

The lengthwise grain line is always oriented parallel to the selvage of the fabric. This alignment is crucial because the lengthwise grain—composed of the threads that run along the length of the fabric—provides the greatest strength and stability. When patterns are cut along the lengthwise grain, the final garment or product will hang and drape correctly, as these threads have a natural stretch and recovery that supports the overall structure.

Additionally, proper grain orientation helps in preventing distortion during sewing and wearing. If the lengthwise grain were to be oriented perpendicularly, diagonally, or at an angle to the selvage, it could lead to issues such as uneven seams, twisting, or puckering, affecting the fit and appearance of the finished item. Therefore, having the lengthwise grain line parallel to the selvage is essential for quality sewing practices.