Learn the גמרא דף לו: אתרוג קטן until “ובגדול כדי שיאחז” (two dots) https://hebrewbooks.org/shas.aspx?mesechta=7&daf=36b&format=pdf
Question:
What is the comparison of the size of the stones one is permitted to carry into the בית הכסא on Shabbos to the minimum size of an Esrog?
See ערוך לנר “כך מחלוקת
https://hebrewbooks.org/pdfpager.aspx?req=14414&st=&pgnum=138
Review the last four lines of the משנה דף לד עמוד ב starting from “שיעור אתרוג קטן” which brings a machlokes between רבי יהודה and רבי יוסי regarding the maximum size of an Esrog
https://hebrewbooks.org/shas.aspx?mesechta=7&daf=34b&format=pdf
Learn the “גמרא דף לו: “אתרוג קטן (two dots) until the Mishna
Questions:
According to רבי יהודה why is an Esrog that is larger than half of his hand grip pasul?
Learn the גמרא דף לא: “ת”ש ובגדול (three lines before the wide lines) until the two dots.
https://hebrewbooks.org/shas.aspx?mesechta=7&daf=31b&format=pdf
Does רבי יוסי have a maximum size for an Esrog?
Learn the ר”ן דף יח. דפי הריף “משנה – ובגדול כדי שיאחז until the next Mishna.
https://hebrewbooks.org/pdfpager.aspx?req=14319&st=&pgnum=618
Learn תוספת דף לד: “שתהא
Who brings machlokes between the בה”ג and ר”ת whether one must hold all the Daled minim in his hand at the same time in order to fulfill the Mitzvah.
Question:
According to ר”ת that one must hold all the Daled minim at the same time how can an Esrog the size of a watermelon be kosher as it’s impossible to hold all the minim?
See ערוך לנר