Definitions of proportion:

• noun:   harmonious arrangement or relation of parts or elements within a whole (as in a design)
• noun:   magnitude or extent

  Example: "A building of vast proportions"

• noun:   the quotient obtained when the magnitude of a part is divided by the magnitude of the whole
• noun:   balance among the parts of something
• verb:   give pleasant proportions to
• verb:   adjust in size relative to other things