From Wikipedia, on a subject dear to me, namely the question What is the size of the observable universe in proportion to the size of the entire universe that emerged in the Big Bang?
[Per]"Alan Guth, if it is assumed that [cosmic] inflation began about 10−37 seconds after the Big Bang, then with the plausible assumption that the size of the Universe before the inflation occurred was approximately equal to the speed of light times its age, that would suggest that at present the entire universe's size is at least 3x1023 times larger than the size of the observable universe.[18] There are also lower estimates claiming that the entire universe is in excess of 250 times larger than the observable universe[19] and also higher estimates implying that the universe is at least 101010122 times larger than the observable universe[20]"
Source: https://en.wikipedia.org/wiki/Observable_universe#The_Universe_versus_the_observable_universe
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