שמות, פרק ל״ו, פסוק ט׳

The construction of the Tabernacle required absolute precision, ensuring that its coverings fit together perfectly to form a unified structure. The curtains crafted for this purpose were made with strict uniformity. Each individual piece was woven to an exact measurement of twenty-eight cubits in length and four cubits in width. This careful attention to detail guaranteed that every single curtain was completely identical in size, leaving no room for variation [ביאור שטיינזלץ].

The specific unit of measurement employed for this task, the cubit, is generally understood to be the standard, everyday length used at the time. However, there is another perspective suggesting that a unique, specialized cubit was used exclusively for this sacred work. This distinct measurement is thought to be similar to a specialized unit known as the "atzilah," which would later be utilized in the construction of the First Temple [אבן עזרא].