atonement lid

This is the lid that sits on top of the ark where the atonement offering was made.

two and a half cubits ... a cubit and a half

A cubit is 46 centimeters. Alternate translation: "2.5 cubits ... 1.5 cubits" or "115 centimeters ... 69 centimeters" (See: rc://en/ta/man/translate/translate-bdistance and rc://en/ta/man/translate/translate-fraction)