[@kc4cop]
When you click on a title of the giveaway, just above: “YES, I WANT THIS”- a page with the detailed description of the software will open. And there, on the right side of the window, a small area with Technical Details always appears, where the size of a setup file is given: in this case 534 MB. Now, the size of the installed program will always differ depending on the type of software, its functions, plugins and so forth. In this particular case it is about 914 MB (937 MB on disk-on my 64 bit machine).
Cheers,
consuella