The 2005 Guide to Literary Agents (Writer's Digest) suggests one page of synopsis for every 25 pages of book. Ack!I've done four verions of my synopsis so far. They range from 1 paragraph to three pages.
Yea well those clever little elves at WD don't have to read the damn things now do they?
Considering that most manuscripts I have weigh in between 200-500 pages I gotta tell you: NO.
LESS is MORE.
Repeat after me: LESS IS MORE
Synopses are mostly horrible to read. For proof see Crapometer #1 - #99.
They don't have conflict, character development, much humor (serial scrubbers aside of course) or suspense. That's ok though; they are not designed for that.
BUT given that you know this is going to be a tedious read, just do me a big fat favor: make it short. 1000. Words. Or. LESS.
You think you can't do that? Trust me, you can. And you SHOULD.
Long synopses, unless you are writing bodaciouisly long books are stupid.
Don't do it.
Repeat after me, in fact, let's all chant: Less is More. Less is More. Less is More.