What measurement is defined as the distance from one shoulder to the other?

Shoulder width is the correct measurement that refers to the distance from one shoulder to the other. This measurement is crucial in tailoring and designing clothing to ensure proper fit and comfort. It determines how a garment will sit on a person's shoulders, which can impact the overall silhouette and appearance of the piece.

In contrast, chest width measures the circumference around the chest area, sleeve length pertains to the distance from the shoulder seam to the end of the sleeve, and neck circumference is the measurement around the neck. These other measurements serve different purposes and contribute to fit in other areas of clothing but do not specifically describe the distance between the shoulders. Understanding these definitions helps in accurately conveying fitting requirements in fashion and garment construction.