The phrase "overall footprint" refers to the total impact or effect that something has on the environment or a particular situation. It essentially describes the overall amount of space, resources, or influence that something occupies or uses.
Considering the larger overall footprint of the device though, a slightly lower placement of the power button would have made for a better handling experience. (androidauthority.com)
All three speakers also have gripping rubber feet and a small overall footprint. (heavy.com)
Leaving aside one of these cars has a boot and the other is a hatchback, they were similar in overall footprint. (motoring.com.au)