Which term describes the ability of a product to be changed in size to fit a range of percentiles?

• A. Adjustability
• B. Alertness
• C. Anthropometrics
• D. Comfort

Answer: (A)

Adjustability describes a product’s ability to be altered in size to fit a range of percentiles. In design, percentile data represent different sizes within the population, so a truly adjustable product can be configured to accommodate both smaller and larger users—think of features like adjustable seat height, width, or strap length. This capability directly addresses fitting across the range of body sizes, making it the best term. Anthropometrics is about gathering and using those body measurements to inform design, not the product’s ability to change size. Comfort is about how good the product feels to use, and alertness is unrelated to sizing.