Ezekiel 40-42 - Three entire chapters of measurements and descriptions of a temple. Cubits, cubits, cubits! It's hard for me to follow, yet in Ezekiel 40:4 God tell Ezekiel to "set your heart upon all that I shall show you, for you were brought here in order that I might show it to you. Declare all that you see to the house of Israel." Perhaps the detailed description is because Ezekiel took that charge seriously and wanted to bring back an accurate description of what he had seen.
I have to admit, I only skimmed these chapters. I always wonder if I'm missing the point of passages like this. I suspect it had more meaning to Israel than it does for us today.