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Adjective: pocket-sized  'pó-kit,sIzd
  1. Small enough to be carried in a garment pocket
    "pocket-sized paperbacks";
    - pocket-size, pocketable
     
  2. Relatively moderate, limited, or small
    "a newspaper with a pocket-sized circulation";
    - minor, modest, small, small-scale, pocket-size

See also: limited, little, small