What was the size of the cosmic egg singularity before the Big Bang?
If it really was a singularity (not possible by current quantum theory), its size was zero. Bottom line is that no one really knows what happened or how the Universe looked at “time zero”, let alone before the big bang. It’s not even clear that such a concept as “before” is even possible; time as we know it may have started with the the big bang and did not exist before time zero.
