(8) Thirty cubits.--The additional cubit on either side (comp. Exodus 26:2) would hang down and form a "valance" along the sides of the tent. (See Exodus 26:13.)

Verse 8. - The length... shall be thirty cubits. A tent with a rectangular roof, over such a chamber as the mishkan, brought down, as tents usually are, within six or seven feet of the ground, would have required a covering of this length. If the slope of the roof had been greater, the covering must have been longer. The breadth... four cubits. This gives for the entire covering, when made up, a width of forty-four cubits, or sixty-six feet. As the entire length of the mishkan was only thirty cubits, or forty-five feet, it is evident that the tent projected considerably beyond the tabernacle, either at both ends, or, at any rate, at one end. Probably the projection was at one end only - viz., in front; where it constituted a porch, eighteen or twenty feet deep. The temple, which was modelled after the tabernacle, had a porch fifteen feet deep.

26:7-14 The curtains of meaner materials, being made both longer and broader, covered the others, and were defended by coverings of skins. The whole represents the person and doctrine of Christ, and the church of true Christians, and all heavenly things, which outwardly are mean, but inwardly, and in the sight of God, are glorious and precious.The length of one curtain shall be thirty cubits, and the breadth of one curtain four cubits,.... The breadth of them is the same with the linen curtains, but the length of them two cubits more; the reason of which was, that they might hang down lower on either side, and the better preserve them from any injury:

and the eleven curtains shall be all of one measure; as to length and breadth.