Reference for Bekhorot 75:38

הניחא לרבי מאיר אלא לרבנן מאי איכא למימר

The Mishnah above states distinctly a 'large borer', from which we can deduce that an ordinary borer is smaller than a sela'.<span class="x" onmousemove="('comment',' And Beth Shammai in connection with the passage above referring to the loss in the skull mean by the term 'borer' the ordinary one, which is smaller than a sela'. Therefore the measurements of the two schools are not alike.');">²⁸</span>

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