6. (a) How does John describe the measuring of the city, and what does this measuring indicate? (b) What may explain that the measure used was “according to a man’s measure, at the same time an angel’s”? (See footnote.)

⁶ John continues his account: “Now the one who was speaking with me was holding as a measure a golden reed, that he might measure the city and its gates and its wall. And the city lies foursquare, and its length is as great as its breadth. And he measured the city with the reed, twelve thousand furlongs; its length and breadth and height are equal. Also, he measured its wall, one hundred and forty-four cubits, according to a man’s measure, at the same time an angel’s.” (Revelation 21:15-17) When the temple sanctuary was measured, this guaranteed the fulfillment of Jehovah’s purposes with regard to it. (Revelation 11:1) Now, the angel’s measuring New Jerusalem shows how unchangeable Jehovah’s purposes are with regard to this glorious city.a

 7. What is remarkable about the city’s measurements?

⁷ What a remarkable city this is! A perfect cube 12,000 furlongs (about 1,380 miles) [2,220 km]) in perimeter, surrounded by a wall 144 cubits, or 210 feet [64 m], in height. No literal city could ever have such measurements. It would cover a territory about 14 times as large as modern Israel, and it would tower almost 350 miles [560 km] into outer space! Revelation was given in signs. So, what do these measurements tell us about heavenly New Jerusalem?

 8. What is denoted by (a) the city’s 144-cubit-high walls? (b) the city’s 12,000-furlong measurement? (c) the city’s being a perfect cube in shape?

⁸ The 144-cubit-high walls remind us that the city is made up of 144,000 spiritually adopted sons of God. The figure 12 that appears in the 12,000-furlong measurement of the city​—with the length, breadth, and height being equal—​is used figuratively in organizational settings in Bible prophecy. Hence, New Jerusalem is a superbly designed organizational arrangement for accomplishing God’s eternal purpose. New Jerusalem, together with the King Jesus Christ, is Jehovah’s Kingdom organization. Then there is the shape of the city: a perfect cube. In Solomon’s temple, the Most Holy, containing a symbolic representation of Jehovah’s presence, was a perfect cube. (1 Kings 6:19, 20) How fitting, then, that New Jerusalem, illuminated by the glory of Jehovah himself, is seen as a perfect, large-scale cube! All its measurements are perfectly balanced. It is a city without irregularities or defects.​—Revelation 21:22.