Which grain line in a woven fabric offers the least amount of stretch?

In woven fabrics, the grain lines refer to the orientation of the threads that are woven together. The lengthwise grain, which runs parallel to the selvage, typically provides the most stability and least amount of stretch. The crosswise grain runs perpendicular to the lengthwise grain and offers a moderate amount of stretch, especially when pulled diagonally.

The diagonal grain, which runs at a 45-degree angle to both the lengthwise and crosswise grains, allows for the most stretch. This is due to the way the threads can move relative to each other when tension is applied.

Choosing the crosswise grain signifies that it provides some stretch but is still more stable compared to the diagonal grain, which has the most elasticity. Therefore, while the lengthwise grain is generally the most stable, the crosswise grain offers the least amount of stretch compared to the diagonal grain, thus making it the right choice in this scenario.