The phrase "body size" refers to the physical dimensions and proportions of a person's body, such as height, weight, and overall build. Full definition
The distribution of body sizes of both individuals and species within fish communities is a central theme underlying the different aspects of my project. (coralcoe.org.au)
They clearly took advantage of that opportunity, as we can see by their rapid increases in body size and ecological diversity. (sciencedaily.com)
As far as the scientists who conducted the study know, their work is the longest known time series on body size variation in butterflies. (treehugger.com)