Publishing a book has a few pitfalls, at least if you self-publish on Amazon. I had assumed you wrote it in Microsoft Word or something similar, then just submitted it. It hadn't occurred to me that size was important - it's never been an issue before.
So, I thought that about 450 pages would be a reasonably generous size because I'd hate my readers to be disappointed. But 450 pages on the default MS Word page size, when uploaded became about 750 when auto-formatted for Kindle.
Okay, I thought, so that's really generous and it costs so little. Go for it! Now for the paperback.
Well, that was easy, I thought. All you have to do it tell Amazon's CreateSpace publishing department to auto-fit it to the page size you've chosen - 8 x 10 inches - and it'll do the rest. All I have to do now is order a few proofs - enough for family and friends at the special price - and wait for the parcel to arrive all the way from America. Best wait to check that they look okay before unleashing them on the waiting paperback book market though, just in case...