Definitions:
the relative extent of something; a thing's overall dimensions or magnitude; how big something is

each of the classes, typically numbered, into which garments or other articles are divided according to how large they are

alter or sort in terms of size or according to size

estimate or measure something's dimensions

having a specified size; sized

a gelatinous solution used in glazing paper, stiffening textiles, and preparing plastered walls for decoration.

treat with size to glaze or stiffen