What is the difference between a man's chest and waist measurements typically known as?

The difference between a man's chest and waist measurements is typically known as the drop. This term is used in the context of men's suit sizing and describes the difference in size from the chest measurement to the waist measurement. For example, a suit with a drop of 6 means that if a man's chest measures 42 inches, his waist would measure 36 inches. The drop is crucial in determining how suits fit, especially for those seeking a tailored appearance.

In contrast, the other terms do not specifically relate to the measurement differences between the chest and waist:

• Gain typically refers to an increase or addition, not the difference between two measurements.

• Variation refers to a deviation or change but lacks the specificity needed for understanding measurements in this context.

• Reduction implies a decrease but doesn't accurately describe the measurement difference between the chest and waist.

Thus, "drop" is the correct term used in the apparel industry for this specific measurement relationship in men's clothing.