עֶ֥שֶׂר אַמֹּ֖ת אֹ֣רֶךְ הַקָּ֑רֶשׁ וְאַמָּה֙ וַחֲצִ֣י הָֽאַמָּ֔ה רֹ֖חַב הַקֶּ֥רֶשׁ הָאֶחָֽד׃
Ten cubits was the length of a board, and a cubit and a half the breadth of each board.
Read midrashic interpretation of Exodus 36:21: and classical rabbinic exegesis.