Big Bang & Inflation question....

Hello everyone. I'm new, glad to be here and this is my first post. I've been unable to find an answer to a question I have researching it online, so I thought I might as well ask the experts. Here goes:

The recent news about the Big Bang & Inflation, as per the First Direct Evidence of Cosmic Inflation article at http://www.cfa.harvard.edu/news/2014-05 is quite amazing. My question is this: If the known universe did a very very rapid expansion a trillionth of a trillionth of a trillionth of a second after the Big Bang, does anyone have an idea of how far or big our known universe inflated during that super-rapid expansion in the tiny fraction of a second? I mean did it expand almost instantly into an area 10 inches in diameter or 10 light-years or 100 light-years or 100 million light-years in diameter?(I'm assuming that our current known universe has a diameter to be measured, like if our known universe is about 14 billion years old is it then perhaps about 28 billion light-years in diameter?)