Wordnet 3.0
ADJECTIVE (2)
1. 
 having a specified size; 
2. 
 having the surface treated or coated with sizing; 
The Collaborative International Dictionary of English v.0.48:
Size \Size\, v. t. [imp. & p. p. Sized; p. pr. & vb. n.
   Sizing.]
   To cover with size; to prepare with size.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Sized \Sized\, a.
   1. Adjusted according to size.
      [1913 Webster]
   2. Having a particular size or magnitude; -- chiefly used in
      compounds; as, large-sized; common-sized.
      [1913 Webster]
WordNet (r) 3.0 (2006):
sized
    adj 1: having a specified size [ant: unsized]
    2: having the surface treated or coated with sizing [ant:
       unsized]