Merriam-Webster Collegiate Dictionary - size

 I. noun  Etymology: Middle English sise as~, from Anglo-French, short for assise — more at as~  Date: 13th century  1. dialect British as~ 2a — usually used in plural  2. obsolete a fixed portion of food or drink  3.  a. physical magnitude, extent, or bulk ; relative or proportionate dimensions  b. relative aggregate amount or number  c. considerable proportions ; bigness  4. one of a series of graduated measures especially of manufactured articles (as of clothing) conventionally identified by numbers or letters a ~ seven hat  5. character, quality, or status of a person or thing especially with reference to importance, relative merit, or correspondence to needs try this idea on for ~  6. actual state of affairs that's about the ~ of it  II. verb  (~d; sizing)  Date: 1609  transitive verb  1. to make a particular ~ ; bring to proper or suitable ~  2. to arrange, grade, or classify according to ~ or bulk  intransitive verb to equal in ~ or other particular characteristic ; compare — usually used with up and often with to or with  III. adjective  Date: 1848 ~d — usually used in combination bite-~ pieces  IV. noun  Etymology: Middle English sise  Date: 15th century any of various glutinous materials (as preparations of glue, flour, varnish, or resins) used for filling the pores in surfaces (as of paper, textiles, leather, or plaster) or for applying color or metal leaf (as to book edges or covers)  V. transitive verb  (~d; sizing)  Date: 1667 to cover, stiffen, or glaze with or as if with ~