Usually around 37 GB , which then expands to over 50 GB after installation.
If you are looking for "compressed" versions because your hardware is older, you can improve performance with these tips: You need at least an Intel Core i5-750 Go to product viewer dialog for this item. or AMD Phenom II X4 945 Go to product viewer dialog for this item. and 6 GB of RAM . just-cause-3-pc-game-download-highly-compressed-gameboy
These can compress the archive down to 16.7 GB – 24.7 GB , depending on which DLCs or language packs you choose to include. Usually around 37 GB , which then expands