What is one consequence of using insufficient seam allowance?

Using insufficient seam allowance can lead to weak seams that are more likely to come apart. When seam allowance is too narrow, there is less fabric available to hold the stitches securely, which compromises the strength of the seam. This is particularly critical in areas that experience stress and tension, such as armholes or the crotch of pants. If the seam is weak, it can result in the garment tearing or failing during wear, which is undesirable.

Other potential consequences, while they may occur, are less directly related to the insufficient seam allowance itself. For instance, a tightly fitting garment is often more about the overall pattern fit rather than the seam allowance; excessive fraying is typically a concern of the fabric type and finishing rather than seam allowance; needing more fabric for seams relates more to cutting technique than to seam allowance alone. Proper seam allowances are essential for creating durable and well-fitting garments, making their significance paramount in sewing practices.