...wannabe, good luck in your search for that elausive first job.
In my (humble) view, I believe that Irishjetdriver said it all.
In particular, one side of (printed) A4 is quite enough and a good-quality and flattering photo helps too. (Don't rely on one of those awful photo-booth pics!)
When this old-timer was recruiting 737 drivers (not that long ago!), every CV was carefully read and those which met our criteria were kept on file.
In defence of the airlines, which sometimes receive dozens of CVs every day, it is just not possible to respond to every one. However, no-reply does NOT necessarily mean no thanks!!
Stay current, stay proactive and stay motivated.
Best Regards bm
