Did God occupy any space before creation?

Does God have size? If God has size, how big is He? If God has size now, was God always this big?

Some people tell others that their God is too small...

Does this have relevance? .

No.

God is a Spirit, therefore He is not limited by size or space. He is present in all of His creation. That is called "omnipresence".

So, is that no space? or infinite space?

God is not limited to being a spirit. Christ is a perfect example. God has also been seen, which IMO wasn't specifically speaking of the pre-incarnate Christ.

Space, as we understand it, didn't exist before God created it. All the universe had a starting point and God is outside of that.

What do you mean by "space as we understand it"?

Can anyone hide himself in secret places, So I shall not see him?" says the LORD; "Do I not fill heaven and earth?" says the LORD.

- Jeremiah 23:24

God is everywhere!

I was referring to God the Father. He is BOTH an omnipresent Spirit and well as the one who sits on His throne in Heaven, surrounded by the cherubim. Is anything too hard for the Lord? For with God nothing shall be impossible.

As to the pre-incarnate Christ, He was the only one seen by men, because the Bible says that no man has seen God [the Father] at any time. The only begotten Son, who is in the bosom of the Father hath declared Him [or made Him known or revealed Him to men through Christ] (John 1:18).

We have one scoffer here who claims that Christ could not possibly have been "the Angel of the LORD" in the OT. But a careful study of who this Angel is and how men responded to His presence will confirm that this was one of the aspects of the pre-incarnate Christ. As a matter of fact the third chapter of Exodus will make this crystal clear. The one who said that He is "I AM" is the one who appeared as the Angel of the LORD at the burning bush. When Christ identified Himself as "I AM" to the Jews, they should all have fallen down and worshiped Him. And He identified Himself in this way several times.

Infinite space would be more like it, although scientists now say that space is in fact finite. Only God knows.

Matthew 19:26b

It would seem attempting to measure the immeasurable be a venture in futility.

Space as in space within the universe. The universe has a beginning. A starting point. God existed before the universe when He created the universe. It wasn't created with Him inside of it. This is what makes Him omnipresent and omnipotent. He is outside of time and physical space.
Think of all of existence, past, present and future as being within a bubble, that's from beginning to end. God would be the one holding that bubble in the palm of His hand.

"the train of His robe filled the temple"

... sorry, that's what popped into my head when i read the question.

1Ki 8:27 But will God indeed dwell on the earth? behold, the heaven and heaven of heavens cannot contain thee; how much less this house that I have builded?

Psa 139:7 Whither shall I go from thy spirit? or whither shall I flee from thy presence?
Psa 139:8 If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there.

God is an omnipresent Spirit, and an invisible Spirit that no person, or angel can see but we can see a visible image of Him.

1Ti 3:16 And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.

1Ti 6:14 That thou keep this commandment without spot, unrebukeable, until the appearing of our Lord Jesus Christ:
1Ti 6:15 Which in his times he shall shew, who is the blessed and only Potentate, the King of kings, and Lord of lords;
1Ti 6:16 Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.

It seems that many people read the word "angel" and assign certain characteristics instead of taking the word at its simplest meaning: messenger. "Angel" is a role, not an identity. So having the pre-incarnate Jesus appear in the role of a messenger from the Father is legitimate. It neither limits nor diminishes Him.

Some here seem to doubt that Melchizedek, King of Salem, is not Yeshua Hamashiach.

All one need accomplish in order to know He is is quite simple. Translate the meanings of the King's title.

Melchizede means King of Righteousness, and there is no doubt as to Who this is and always has been. King of Salem, no brainer, King of Peace, is only our blessed Savior.

Just as when the Twelve looked upon Jesus Yeshua, they did see the Father, so it is with Melchizedek King of Righteousness. Abraham was honoring Jesus Yeshua, yes, he was.

If God says it in His Word, believe with that gift of faith given you when you first came to believe.

God bless all.

It doesn't surprise me that God likes big trains.