Which of the following stitches is typically NOT used for smart trousers?

The use of an elastic stitch is typically not associated with smart trousers. Smart trousers are designed for a polished and tailored appearance, often made from fabrics that require a neat and structured finish. An elastic stitch is primarily used for stretching fabric, providing flexibility in activewear or casual attire where comfort and movement are critical. It is generally not conducive to the tailored look that smart trousers aim to achieve, as it can create a bulkier seam and may detract from the sophisticated appearance expected in formal clothing.

In contrast, the other types of stitches listed serve specific purposes that align with the requirements for smart trousers. A normal stitch is versatile and widely used for general sewing, making it suitable for various fabric types. A blind stitch provides a nearly invisible seam, ideal for hems in smart trousers to maintain a clean line without visible stitching. A double stitch adds durability and strength to seams, which is also important in ensuring that smart trousers hold their shape and withstand wear over time.