How many pages for a chapter

I think it really depends on what the chapter is supposed to do. Is it going to move the narrative on, is it meant to introduce a new character/place (or give an extra insight into an established one), or is it a piece of plot required to set something up or sign post something further on or tie up part of the story. It can be doing more than one of these (and many other things) but the rule I work to is once it has achieved its that's it done. So I guess I would say the right length is no longer than it needs to be.

A technique I use when starting a new chapter is to take a small cue card and write a list of the goals of the chapter, where the reader will be at the start of the chapter and where they need to be by the end. I then keep this pinned up in front of me while I'm writing. I find it helps keep things tight and stops including extra info/action/description that isn't really needed.

Like Adrian said, a chapter should be a self-contained episode. I have written when one of my chapters hardly fills a page and it is rare for me to reach ten pages. I personally don't like chapters that drag on too long. A change of chapter allows a natural break/halt and if the previous one hasn't been too long, it makes it easier to pick up and continue reading.

I asked this the other day because I'm having trouble with it too. I know in my genre chapters are meant to be short. Women's fiction generally has nice bite-sized chapters for busy women so they can read just a small amount at each sitting, but exactly how many that small amount should be, I don't know.

I think Adrian's guide is right, though. If you're over fifteen pages, you probably need to divide it or edit it back.