How big is the Universe?

In Msg 318,, of the Is It Science forum, thread; Faith vs Skepticism - Why faith, Onifre posted the following quote. Since I figured a response would lead off topic to that thread, I'm importing the message here for my response since that relates more to this topic. Onifre, I deduce the following from your message:1. "...our universe represents all of existence."
2. The universe is not finite.
3. Spacetime is finite.
4. Spacetime exists, therefore finite spacetime is within the universe which is not finite.
5. As per the above, spacetime would have an outside of but the universe no outside of.Also this question: Was the expansion the expansion of spacetime?

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BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.

You haven't led me to that opinion. That was the deduction which your statements conveyed. If the universe just is and just was, having existed under different space and time dimensions, the Buzsaw unbounded space eternal universe hypothesis is beginning to look more scientific. I like that. Now, if we can just accept the possibility that God just (eternally) was, just is, and just (eternally) will be, perhaps creationists and secularists will begin to tolerate one another in a more congenial manner here at EvC. Deduction so far, as per your statements:
1. The universe is not finite and existed, having had non-finite existing space, non-finite existing time and no outside of (unbounded).
2. Spacetime is a finite period of time when the universeexisting space and time, previously having existing different non-finite time and dimension began to expand, for no explicable reason.
3. Since spacetime, which represents the universe began expanding as a submicroscopic area the not finite universe, having existing space and time was sub-microscopic dimensionally at the time of the beginning of expansion.
4. The not finite universe allegedly became inexplicably finite when the expansion began.
5. Contradiction:
a. The universe is not finite.
b. Spacetime is finite.
c. Existing finite expanding spacetime is the existing not finite (abe: spacetime) universe. Edited by Buzsaw, : as notedEdited by Buzsaw, : fix previous edit.

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BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.

Hi, Greyseal. That doesn't help much.
Continuum contradiction:
1. Spacetime had a beginning, i.e. is finite
2. The universe is not finite, i.e. had no beginning, having existed before spacetime expansion with different space and time dimensions.
3. Once not finite space and time universe is the existing finite spacetime, not finite universe. So you're alleging that the universe, both which have been since 13.7 bya are now one and the same, spacetime being finite and the universe not finite yet both being the one and same expansion? How does that work? Yah, I know. Inexplicable, aspects of theories never seem to work well for the theorists. Mmm, then why have I wasted so much time and bandwidth over the past seven years promoting an unbounded infinite universe here at EvC?

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BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.

Hi Onifre. I was compliling my message as you posted, so didn't see it before responding to Greyseal. I have to go now, but will study your response when I can get to it.

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BUZSAW B 4 U 2 C Y BUZ SAW.
The immeasurable present eternally extends the infinite past and infinitely consumes the eternal future.

I appreciate the info from Onifre and Cavediver. I need to study and think on these before further responses.

Accidental double post. Edited by Buzsaw, : As noted