What is the largest age gap you'd consider?

Women and men, what is the largest age gap you'd consider? I'm 33(m) and often have to remind myself that I'm not in my 20's anymore.

I've read lots of posts and comments about how people of different ages are at different stages in their lives/want different things at different ages.

I once was attracted to a girl at work when I was 30 but found out she was only 20. Sounds bad I know but she looked older than she was . She was absolutely lovely though but if I did end up dating her, no doubt I'd be called a pervert or peadofile or whatever.