size

thumb|right|A diagram comparing the size of an average human diver to the size of the modern great white shark, [[whale shark, and the prehistoric megalodon. The illustration also contains a linear measurement in meters in the middle.]] thumb|right|A size comparison illustration comparing the sizes of various planets and stars. In each grouping after the first, the last object from the previous group is presented as the first object of the following group, to present a continuous sense of comparison. thumb|right|A bat skull next to a ruler used to measure size. Size: thumb|right|A finch egg next to a dime; a person familiar with the size of a dime would thereby have a sense of the size of the egg. thumb|right|Forced perspective illusion wherein the perceived size of the Sphinx next to a human is distorted by the incomplete view of both, and the appearance of physical contact between the two

Size in general is the magnitude or dimensions of a thing. More specifically, geometrical size (or spatial size) can refer to three geometrical measures: length, area, or volume. Length can be generalized to other linear dimensions (width, height, diameter, perimeter). Size can also be measured in terms of mass, especially when assuming a density range. thumb|This animation gives a sense of the scale of some of the known objects in our universe.