Parallel
Exodus 28:16
Rahlfs Septuagint (1935) · Berean Standard Bible
τετράγωνον ἔσται διπλοῦν σπιθαμῆς τὸ μῆκος καὶ σπιθαμῆς τὸ εὖρος
It must be square when folded over double, a span long and a span wide (note: The breastpiece, when folded over, was approximately 9 inches or 22.9 centimeters in both length and width.).