@The Outsider
As REP said, my target is about 35k which works out to about 6,000 words; one chapter topped out at 45k. The story I'm working on will also have a 7k prologue.
I've never specifically 'weighed' my files. I keep tabs on the word count, subtracting the extraneous epigraphs and section headers (after all, they're not my words), but there are two distinct camps.
One is the SOL pages camp, which feels that they need to dump a certain amount, regardless of content (i.e. whether the chapter actually says that much), while there's another--mostly us 'publishing' types--who write whatever the chapter requires, regardless of size.
My recent The Holes Binding Us Together had two pre-teen protagonists, so the sentences and dialogues were much shorter than normal, resulting in smaller file sizes. After multiple posting failures, I finally reposted combining the first especially short opening chapters as a single file (readers were bitching about NEVER reading another tale if that's all there is to one), but that line is notoriously fuzzy.
But, generally, since I write episodic chapters (i.e. chapters that focus on a specific event, rather than the largely unfocused 'day in the life' chapters, I'm reticent to 'repackage' things for any one site (though I have prepared 'safe' chapters for Finestories, but that's a separate case.
@Switch
Yikes, I've posted the first 5 chapters of my current novel and they total 58K. The first chapter was around 11K (2,166 words).
But I don't write a novel with SOL in mind, that is, posting a chapter a week. I write it for the person who has the entire novel so if he wants to read more he just turns the page.
That's more akin to my thinking. Rather than attacking authors who don't post a specific number of SOL pages, just wait until the story has been posting a while so you're guaranteed to have a sufficient quality? Is that really so onerous?