![The Magazine of Fantasy and Science Fiction July 1973][1] ![Urania 637][2]

Possibly ["**The Giantess**"][3] by Robert F Young.


The story has appeared in couple of publications, including  "The Magazine of Fantasy and Science Fiction: July 1973" and "Urania #637" (pictured above). The following are some excerpts:

> Hill saw no sign of his quarry. Nevertheless, he knew she was
> somewhere in the valley. The Hujiri had told him she was childlike in
> more ways than one and kept irregular hours. More than likely she was
> taking a nap in some secluded bower.

This passage soon after he spots his target:

> Consequently, it was some time before he realized that the young and
> lovely girl sleeping at the foot of the cliff far exceeded her seeming
> size.

And this segment reflects the doubts his higher-ups had:

> It had occurred to Galactic Guidance. Hill's dossier contained not only
> the information he had volunteered but the data GG's investigative
> division had dug up behind his back. The latter far outweighed the
> former, and it said as plain as day that a mission involving a
> sadistic giantess would be suicidal for Norman Hill. Why, then, had
> Galactic Guidance dispatched him post-haste to Primeval?

You can read the complete story [here][4] or [here][5].


  [1]: https://i.sstatic.net/BGYuW.jpg
  [2]: https://i.sstatic.net/AVYcQ.jpg
  [3]: http://www.isfdb.org/cgi-bin/title.cgi?50631
  [4]: http://giantessworld.net/Stories6/giantess__by_robert_f.htm
  [5]: http://www.doc88.com/p-18264349202.html