Nope.. God created the universe and the universe needs size because it is physical.. God who existed before there was anything physical does not need anything physical and thus He does not need to be a ""Size"" Your logic is human logic thinking God is of this or a part of the physical universe.. The Creator's creation is not limited by any attribute of God..
Glad you only believe in one God.. The only misconception you have is that God needs to be bigger then the universe for God to be able to know it all, as it is, in any instant of it's space time..
Scripture describes God as having **size**. Why do you feel compelled to deny scripture chsracterising God as having size?
Psalm 8:3–4. When I consider thy heavens, the work of thy fingers, the moon and the stars, which thou hast ordained;
Ps. 95:3For the LORD is a great God, and a great King above all gods.
4In his hand are the deep places of the earth: the strength of the hills is his also.
5The sea is his, and he made it: and his hands formed the dry land.
6O come, let us worship and bow down: let us kneel before the LORD our Maker.
Ps.139:5Thou hast beset me behind and before, and laid thine hand upon me.
6Such knowledge is too wonderful for me; it is high, I cannot attain unto it.
7Whither shall I go from thy spirit? or whither shall I flee from thy presence?
8If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there.
9If I take the wings of the morning, and dwell in the uttermost parts of the sea;
10Even there shall thy hand lead me, and thy right hand shall hold me.
Acts 17:26And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation;
27That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
28For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.
Is.40:12Who hath measured the waters in the hollow of his hand, and meted out heaven with the span, and comprehended the dust of the earth in a measure, and weighed the mountains in scales, and the hills in a balance?
13Who hath directed the Spirit of the LORD, or being his counsellor hath taught him?
14With whom took he counsel, and who instructed him, and taught him in the path of judgment, and taught him knowledge, and shewed to him the way of understanding?
15Behold, the nations are as a drop of a bucket, and are counted as the small dust of the balance: behold, he taketh up the isles as a very little thing.
Is.48:13Mine hand also hath laid the foundation of the earth, and my right hand hath spanned the heavens: when I call unto them, they stand up together.