The inner room was the Most Holy Place. It was the only square room in the temple. This room was the most sacred space in the building.
A person reached it by passing through three openings. Each opening was narrower than the one before it. Access became more limited as a person moved closer to God.
The entrance to the entry room was about 7.5 meters wide (24.5 feet; Ezekiel 40:48). The doorway into the sanctuary was about 5.3 meters wide (17.5 feet; 41:2). The entrance to the Most Holy Place was only about 3.2 meters wide (10.5 feet).
Ezekiel did not enter the Most Holy Place. He stood outside and waited while the angel went in alone and measured the room.