What does mass measure in terms of design?

Mass in design refers to the perceived weight and volume of an object in a composition. It encompasses how substantial or dense an element appears within the space of the design, which can significantly impact the overall balance and focus of the piece. When designers consider mass, they’re looking at how elements occupy space and the visual 'weight' they carry.

By understanding mass, designers can create emphasis by placing heavier mass elements in certain areas to draw the viewer's attention, allowing for a more dynamic and engaging composition. This is particularly important in fields like advertising design, where visual impact is crucial to convey messages effectively.

The other options, while important aspects of design, do not accurately define what mass measures. Texture relates to the surface quality, color pertains to hues and their emotional meanings, and shape refers to the outline or form of an object, none of which directly represent the idea of mass in the context of design. Thus, volume is the key concept that encompasses the notion of mass in design.