sentences:  Based on a "mikveh" with the dimensions of 3 cubits deep, 1 cubit wide, and 1 cubit long, these were the minimal measurements needed to reach a volume of water that was "estimated" at being forty "se'ah"s of water.The exact volume referred to by a "se'ah" is debated, and classical rabbinical literature specifies only that it is enough to fit 144 eggs.In some Orthodox Jewish circles there is a proclivity to follow the stringent ruling of Avrohom Yeshaya Karelitz, or Eliyahu of Vilna, whose view is that the size of eggs has progressively become smaller over the ages, therefore requiring a larger measure.