What is added to commercial patterns to allow for wearing comfort?

The term that refers to the additional space incorporated into commercial patterns for comfort is "ease." Ease is essential in garment construction as it enables the wearer to move freely without feeling restricted. It accounts for the body’s natural shape and movements, ensuring that the finished garment fits pleasantly.

When designing a pattern, ease is included to provide more room in areas such as the bust, waist, and hips, which allows for the various activities a person engages in while wearing the garment. This consideration is vital in achieving a well-fitting and comfortable piece of clothing.

The other terms, while related to sewing and pattern-making, do not specifically denote this concept. Allowance often refers to the additional fabric added for seams or hems, margin may pertain to the space around elements in design, and fitting relates to the process of adjusting a garment to achieve the desired fit, rather than the pre-planned comfort that ease provides.