Selected answers from the Dumb SEO Questions Facebook & G+ community.
vo thang: Google isn`t recommend how much size of webpage.They`ve just said as small as possible.So you should care visitors.If Your website have load time so long, visitors are intermediately go out.
You can use "page speed insight" tools for checking to speed website.
My website of customer is usually about 800Kbs-1.2Mb.