A CV stands for curriculum weight it is a document which is used when applying for a job. It allow us to summarise our education, our skill and experience and enable us to successfully sell our abilities to the employers. Standard CV size is no longer than two sides of A4. if you are recent graduate and your CV take up only one page that's completely fine. But if you are academic or medical student your CV may be longer depending on your experience and skills. If you are writing the CV stick to the relevant information and don't repeat what you said earlier.
Here's a brief outline of what you should include in a CV.
1.Name.
2.Contact details.
3.Photo.
4.Work experience.
5.Reserch.
6.Awards and honours.
7.skills.
Remember to customize your CV to the specific job which you are applying for and highlight the most relevant skill and experience.