The word size may refer to how big something is. In particular: Measurement Dimensions: length, width, height, diameter, perimeter, area, volume Clothing sizes such as shoe size or dress size Body dimensions Human height Human weight In statistics (hypothesis testing), the size of the test refers to the rate of false positives, denoted by α. In computing, filesize size (Unix), a command-line Unix tool. Magnitude or size of a mathematical object. Magnitude of brightness or intens… (More on Size)