How long should a supporting statement be?

Haven't done this in 22 years now. I have to do a supporting statement for another job I'm applying for. How long should a personal statement be when the ask:
You will also be asked to upload a CV and a supporting statement. The supporting
statement must explain how you meet each of the selection criteria for the post
using examples of your skills and experience. This may include experience gained in
employment, education, or during career breaks (such as time out to care for
dependants).
Your application will be judged solely on the basis of how you demonstrate that you
meet the selection criteria stated in the job description
My CV is set.. just not sure about this!

Personally, I've never "done" this.  I've only been asked for this twice and just used a cover letter.  But there was no way I was going to go through 2 pages of "application will have" crap and answer each one fully.

What industry is the job in?  Hopefully someone can guide you a bit more.  If it's in education, for example, you may not be able to get away with just a cover letter.

It completely depends on the industry.

I work in media and journalism so my supporting statements tend to be shorter as most people will glance over the CV but look at the statement to see how you demonstrate the skills for the job.

A good rule of thumb that I've always is to only have a supporting statement that is one (as in just a front) page long.

For me, this usually translates into a couple paragraphs, not normally more than 500 ish words.

If it's for a teaching job, I'm not too sure how long or what to put in it. There are loads of websites that offer templates (just google how to write a supporting statement for .... jobs) for supporting statements that might be a good place to state.

It might also help to have someone read through your supporting statement who works in a similar role or industry to tell you what does and doesn't work, if possible.   

Hopefully someone else gives you a bit more detailed info for you than I.

Its for an Admissions officer job. I'd love to switch jobs when I switch countries!

Its for an Admissions officer job. I'd love to switch jobs when I switch countries!

I'd still go for a one page statement since it's likely that people might glance over the CV and just go for a snappy statement beforehand. Definitely see if you can get someone to read over it