In Melachim I, 6:24-28, it teaches that they were covered with gold after it taught their size. Here, the order is reversed!
Malbim (10 and Melachim I, 6:24-28): There it implies that their measure was before they were covered. Here, Ezra revealed that the measure was after they were covered, and then they touched each other.
Why does it need to say that the wings spanned 20 Amos?
Malbim: If not, one might have thought that the wings were one in back of the other. The verse teaches that they were side to side, and fit miraculously in Kodesh ha'Kodoshim (refer to 3:11:4:1).
Why does it say "l'Amos Chamesh"?
Radak: (The Lamed is superfluous.) This is like "ha'Shelishi l'Avshalom" (Divrei ha'Yamim I, 3:2).
How did the wings fit in the Kodesh ha'Kodoshim?
'Rashi', citing Bava Basra 99a: They fit miraculously. They stood next to each other; and their wings touched. The total span of all four wings was 20 Amos, the entire width of the Kodesh ha'Kodoshim. Their bodies (in between the wings) did not occupy space! 1
'Rashi': We need not say that there was a miracle; the wings of each Keruv touched each other, and the bodies stuck out (Radak ? were under the wings), like a bird that spreads its wings and its body is underneath! (Bava Basra 99a brought this rejection, and five others: (a) perhaps they did not stand next to each other; (b) they were on a diagonal; (c) the Kodesh ha'Kodoshim was 20 by 20 at the bottom, but wider on top; (d) the wings were bent, or (e) they overlapped each other.)
Malbim: It says (verse 13) that they faced the Bayis (lest one say that they faced each other, and there was no miracle), and they stood on their legs (lest one say that that one crouched under the other, and this is how there was room for both).
How tall were the Keruvim?
'Rashi' (from Melachim I, 6:26): They were 10 Amos tall.
