Reducing the size of a photo

[Rajiv Vyas]

This is not a Ubuntu specific question. I am trying to upload some
photos to Craigslist and it won't allow me to because the size is too
large (1.3 Meg per photo). How do I reduce the size of these photos (I
have F-Spot and Gimp) to say 200 kb?

Thanks,

Rajiv