9 And thou shalt make the court of the tabernacle: for the south side southward there shall be hangings for the court of fine twined linen of an hundred cubits long for one side:

10 And the twenty pillars thereof and their twenty sockets shall be of brass; the hooks of the pillars and their fillets shall be of silver.

11 And likewise for the north side in length there shall be hangings of an hundred cubits long, and his twenty pillars and their twenty sockets of brass; the hooks of the pillars and their fillets of silver.

The external wall around the court of the tabernacle would be a long stretch of linen, twenty sheets long, covering a distance of 150 feet. This means that the tabernacle itself would be less than a third of the courtyard’s full length. There would therefore be a great deal of room for gathering and performing sacrifices at the altar.

This outer linen wall is typically said to have been white, though I cannot find an official verification of that in the scriptures. Undyed linen is usually a white or off-white color, so perhaps the assumption is that it would have been that color by default. If so, it would have stood out brightly against the earthy tones of the wilderness and would have been an obvious symbol of purity. If it were white, that does raise the question of how the parts of the tabernacle were maintained, cleaned, and replaced. The bible account does not shine a light there, though.

The linen wall was not a single, unbroken sheet, but was interrupted twenty time by pillars. We are not told the interior material of the pillars, but one would assume shittim wood, as with every other component. Interestingly, we are also not told of any metal overlay upon the pillar. We are told that its sockets would be brass, to match the rest of the courtyard elements, and its hooks would be of silver, but it would seem that the body of the pillar was just bare wood. The transition from bare wood pillars to gold-overlaid pillars seems like a symbol of the change of the naked, natural man being clothed by God’s grace and atonement, just like Adam and Eve as they left the garden of Eden.

Note: It can be difficult to visualize some of the structures described in these verses. Here is an excellent and extremely focused series of animations that show the visual form of the temple and its instruments, built up verse-by-verse from the Exodus record: https://youtube.com/playlist?list=PLpjohncRg94EZ55nJrbaKfi-lfeo3MFgl&si=6wm1J9Sdnu7LKYC_