Thanks Tobias,
It is a little more complex I am afraid. I want people to be able to select multiple items (example width in cm and height in cm) and then the correct values should show up. As there are many variations possible, it would not be possible to create tables unfortunaltely. So I assume that were the possibilities?
I have no knowledge of javascript/coding, but if the above can be done, I would like to outsource this to someone who could do this.