וַיֹּ֣אמֶר אֵלַ֔י מָ֥ה אַתָּ֖ה רֹאֶ֑ה וָאֹמַ֗ר אֲנִ֤י רֹאֶה֙ מְגִלָּ֣ה עָפָ֔ה אָרְכָּהּ֙ עֶשְׂרִ֣ים בָּֽאַמָּ֔ה וְרָחְבָּ֖הּ עֶ֥שֶׂר בָּאַמָּֽה׃
And he said unto me: ‘What seest thou?’ And I answered: ‘I see a flying scroll; the length thereof is twenty cubits, and the breadth thereof ten cubits.’
Read halakhic rulings (Jewish law) on Zechariah 5:2: and classical halakhic sources.