Can I ask how long FFX is?

I've recently got back into FF's, and remembered that I had left this game alone. Last time I played I got to the point where I fought Seymour and his aeon. How far was I through the game?

I've just fought the boss who tries to push you off the cliff - the chocobo eater - how far am I now?

Basically what I'm trying to last, without much love for sidequests etc., how long do you think I will spend on this game playing?