וַיַּ֥עַשׂ כַּפֹּ֖רֶת זָהָ֣ב טָה֑וֹר אַמָּתַ֤יִם וָחֵ֙צִי֙ אָרְכָּ֔הּ וְאַמָּ֥ה וָחֵ֖צִי רָחְבָּֽהּ׃
And he made an ark-cover of pure gold: two cubits and a half was the length thereof, and a cubit and a half the breadth thereof.
Read kabbalistic (mystical) interpretation of Exodus 37:6: and classical mystical sources.