Two to three pages should provide enough space for the most important information. Anything beyond that risks not being read at all. So-called "one-pagers" often become overly cluttered and confusing.

Of course, the length also depends on your experience. So, it's better to keep it concise rather than elaborating unnecessarily.

In general, all information included in the application should be relevant to the position. Exam grades, swimming certificates, or involvement in the local hobby club are usually not necessary—unless, of course, they are highly specific to the job.

Be cautious with references: these involve personal data, and references are unlikely to be as favorable if the referee is called out of the blue without prior notice. The nice phrase, "References available upon request," is perfectly sufficient.

Hobbies can be a good icebreaker. However, the focus should remain on qualifications relevant to the role. Leisure activities should take up minimal space.

When listing languages, don't be too modest, but don't overpromise either. At the latest, if your "fluent French skills" are tested in the interview (and they will be!), you'll need to deliver.