Size may refer to any of the following:
1. The size is the overall dimension of a physical or virtual object. When measuring a 2D virtual object such picture, the width (x-axis) and height (y-axis) are used to determine its size and are usually measured in pixels. Virtual object can also be resized to decrease or increase the overall size of the object. When determine the size of a physical object the width, height, and depth (z-axis) are all used to determine its size and are usually measured in inches.
As far as the size of computers, as computers have advanced the parts that make up the computers and the computers themselves are becoming smaller in size. For example, the ENIAC computer occupied 1,800 square feet, and today a computer several hundred times more powerful can fit in your pocket.
2. Size may also refer to how much space a file takes to be stored on your computer or other media. See disk capacity for further information on this term.