Size of the new city
Size of the New Jerusalem, 12,000 Stadia that is about 2200km cubed or 1,400 miles cubed.
This is the size of the city that John saw come down from heaven - about all of the Mediterranean Sea long, or approximately the distance between Gibraltar and Israel. All the measurements used and the descriptions of this city denote perfection and glory.
The old order has passed away and the new order controlled by has replaced it.
The New Jerusalem
1 Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away, and there was no longer any sea. 2 I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband. 3 And I heard a loud voice from the throne saying, "Now the dwelling of God is with men, and he will live with them. They will be his people, and God himself will be with them and be their God. 4 He will wipe every tear from their eyes. There will be no more death or mourning or crying or pain, for the old order of things has passed away."
5 He who was seated on the throne said, "I am making everything new!" Then he said, "Write this down, for these words are trustworthy and true."
6 He said to me: "It is done. I am the Alpha and the Omega, the Beginning and the End. To him who is thirsty I will give to drink without cost from the spring of the water of life. 7 He who overcomes will inherit all this, and I will be his God and he will be my son. 8 But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practice magic arts, the idolaters and all liars–their place will be in the fiery lake of burning sulfur. This is the second death."
9 One of the seven angels who had the seven bowls full of the seven last plagues came and said to me, "Come, I will show you the bride, the wife of the Lamb." 10 And he carried me away in the Spirit to a mountain great and high, and showed me the Holy City, Jerusalem, coming down out of heaven from God. 11 It shone with the glory of God, and its brilliance was like that of a very precious jewel, like a jasper, clear as crystal. 12 It had a great, high wall with twelve gates, and with twelve angels at the gates. On the gates were written the names of the twelve tribes of Israel. 13 There were three gates on the east, three on the north, three on the south and three on the west. 14 The wall of the city had twelve foundations, and on them were the names of the twelve apostles of the Lamb.
15 The angel who talked with me had a
measuring rod of gold to measure the city, its gates and its walls. 16 The city was laid out like a square, as long as
it was wide. He measured the city with the rod and found it to be 12,00 Stadia or about 2200km or 1,400 miles
in length, and as wide and high as it is long. 17
He measured its wall and it was 144 cubits thick which is about 65 meters or 200 feet, by man's measurement,
which the angel was using. 18 The wall was made
of jasper, and the city of pure gold, as pure as glass. 19 The foundations of the city walls were decorated
with every kind of precious stone. The first foundation was jasper, the
second sapphire, the third chalcedony, the fourth emerald, 20 the fifth sardonyx, the sixth carnelian, the
seventh chrysolite, the eighth beryl, the ninth topaz, the tenth
chrysoprase, the eleventh jacinth, and the twelfth amethyst. 21 The twelve gates were twelve pearls, each gate
made of a single pearl. The great street of the city was of pure gold,
like transparent glass.