שמות, פרק ל״ו, פסוק כ״א

The physical dimensions of the wooden boards establish the ultimate size and shape of the Tabernacle. Although the measurements specify a certain length for these boards, this actually determines the overall height of the sacred structure, because each board was positioned standing completely upright [ביאור שטיינזלץ].

While the exact length and width of every board are clearly detailed, the thickness is noticeably absent. This specific measurement is never mentioned, neither during the actual construction nor in the earlier commands to build the Tabernacle. The omission stands out because the thickness of the boards is a crucial detail, absolutely necessary for properly placing the crossbars that connect the entire structure together [ברכת אשר על התורה].