One page
Name - big as you can at the top
address phone etc
Licences, ratings held
Hours; P1, total, M/E
Relevant flying work experience
Educational background
Basically a CV is to get you in the door for an interview. At the sorting stage, all they are concerned about is- do you have the right licence, hours, experience. They'll look at it for 10 secs, then bin/keep it. Leave the details of your Boy Scout badges etc until they ask for it on the application form