My creative writing was a description. I covered one page in size 10 font approx. 630 words or 2400 characters. But if you are writing a story, try and have a line and stick to it without diverting off into an over-description of someone or something. Alternatively, of course, your creative writing could be a description of a place, real or imaginary. But the key features are the techniques and language.
If you use advanced vocabulary and techniques like alliteration or similes you can get full marks without needing to even have a story, but if you have started writing it already with a story line then that becomes as important as the techniques etc.
In fact we were even told you can do a poem, but you must then analyse and explain your own poem.
Hand written (and it does depend on the size of your writing) it should be about three pages. I would put a cap on it at 2000 words, that's starting to get into real essay mode.
For my other course work I did 800 words for my informed writing (an article). I was lucky in the fact I had already written one as a piece of Biology homework and my teacher allowed me to use that as my article and it got nearly full marks.
IDK about my other course work because that was written by hand, but I did it over a year ago and I don't really remember it that well TBH.