largest

(adjective): Of considerable or relatively great size or extent.
(adjective): Abundant; ample.
(adjective): Full in statement; diffuse; profuse.
(adjective): Free; unencumbered.
(adjective): Unrestrained by decorum; said of language.
(adjective): Crossing the line of a ship's course in a favorable direction; said of the wind when it is abeam, or between the beam and the quarter.

Russia is a large country. The fruit-fly has large eyes for its body size. He has a large collection of stamps.