The ISS has an maximum apparent angular diameter of **about** 30 arc seconds (depending on where it is in the sky). Jupiter is around the same angular diameter right now.
The ISS also moves in a highly inclined orbit, (51 degrees) so we almost always see it traversing from either NW to SE, or SW to NE. It will be unlikely at your latitudes to see it moving W to E.
www.calsky.com can help here.
Hope this helps.
Regards,
Tony Barry