וְאֵ֨לֶּה מִדּ֤וֹת הַמִּזְבֵּ֙חַ֙ בָּֽאַמּ֔וֹת אַמָּ֥ה אַמָּ֖ה וָטֹ֑פַח וְחֵ֨יק הָאַמָּ֜ה וְאַמָּה־רֹ֗חַב וּגְבוּלָ֨הּ אֶל־שְׂפָתָ֤הּ סָבִיב֙ זֶ֣רֶת הָאֶחָ֔ד וְזֶ֖ה גַּ֥ב הַמִּזְבֵּֽחַ׃
And these are the measures of the altar by cubits—the cubit is a cubit and a handbreadth: the bottom shall be a cubit, and the breadth a cubit, and the border thereof by the edge thereof round about a span; and this shall be the base of the altar.
Read midrashic interpretation of Ezekiel 43:13: and classical rabbinic exegesis.