Required Amount of Matzah and Wine for the Seder: Difference between revisions

## Rabbi Avraham Blumenkrantz writes that a Revi’it is 2.9 fl oz (86cc). <ref>Rabbi Avraham Blumenkrantz (The Laws of [[Pesach]] 5771 pg 111) writes that since the four cups are Derabbanan one may use a cup that holds 2.9 oz. </ref>

## Rabbi Shimon Eider writes that according to his measurements, the Revi’it is 3.0 fl oz (89cc). <ref>Halachos of [[Pesach]] (Rabbi Shimon Eider, Chapter 20, Sec D 5, pg 228-230) writes that since the four cups are Derabbanan one may have the smaller measurement which is measuring by eggs and not by thumbs and according to his calculation a Reviyit should be 3 oz and if one is unable to have a Reviyit one fulfills one's obligation with a majority of a Reviyit. See also Weekly Halacha (by Rabbi Neustadt on [http://www.torah.org/advanced/weekly-halacha/5760/tazria.html torah.org]) who writes that one may rely on the view of Rav Chaim Noeh who holds that 3 oz is sufficient being that the cups of wine are Derabbanan. </ref>

## Rav Yisrael Belsky recommended having a Revi’it of 4.3 fl oz (127cc). <ref>Rav Yisrael Belsky on [http://www.ou.org/torah/article/oukosher_pre-pesach_webcast_5771 OU Pre-Pesach Webcast 5771] between minutes 37 and 38</ref>

# If a person is a diabetic and can’t have a lot of wine, the absolute minimum amount is 1.5 oz and a drop more and if one can’t have eat that much one doesn’t have to drink the wine. However, one should consult with one’s doctor who is Torah observant. <Ref> Rav Yisrael Belsky on [http://www.ou.org/torah/article/oukosher_pre-pesach_webcast_5771 OU Pre-Pesach Webcast 5771] between minutes 51 and 52:30 </ref>

* Mishna Brurah 486:1 writes that Tosfot holds a [[Kezayit]] is half of a KeBeitzah with the shell and the Rambam holds it is a third of a KeBeitzah (see Tosfot (Yoma 80b D”H Agav), Rambam (Eiruvin 1:9)). Rav Avraham Chaim Noeh (Shiurei Torah 3:12) argues that Tosfot holds half a KeBeitzah without the shell. Mishna Brurah 486:1 rules that for Deoritta Mitzvot and Bracha Achrona, one should eat the size of half a KeBeitzah, but for Derabbanan Mitzvot, one third suffices. He adds that since one has to make a Bracha on maror, one should eat half a KeBeitzah.  

* The Tzlach (Pesachim 116) holds that the modern day eggs are half the size of those in the days of Chazal. However, Rav Noeh (Shiurei Torah Shaar 3) argues that the modern day eggs have not changed from the days of Chazal. Mishna Brurah 486:1 writes that for the mitzvah deoraitta of matza, one should follow the stringent view of the Tzlach. Even though Vezot HaBracha (pg 6, Birur 1, pg 221) quotes Rav Elyashiv and Rav Shlomo Zalman saying that for Bracha Achrona the widely accepted measurement of the Kezayit is according to Rav Chaim Noeh, in regards to the mitzvah of eating matza, Rav Shlomo Zalman writes in Halichot Shlomo 9:13 that one should be strict for the size of the Kezayit of the Chazon Ish which are based on the opinion of the Tzalach.  

** (1) Halachos of [[Pesach]] (p. 242) quotes Haggadat Kol Dodi (Rav Dovid Feinstein) that for Motzi-Matza, one should eat 6.25”x7” (about one matzah), for Korech 4”x7” (about 2/3 of a matza) and for Afikomen 6.25”x7” (about one matza).  

** (2) Rabbi Bodner in Halachos of K’zayis (p. 93) quotes Rav Moshe Feinstein saying that 43.5cc (about 2/3 of a matza) is sufficient for both kezaytim of Motzi-Matza. Rav Yisrael Belsky on [http://www.ou.org/torah/article/oukosher_pre-pesach_webcast_5771 OU Pre-Pesach Webcast 5771] between minutes 30:30 and 37 endorsed this opinion. He added that if one is able, it's preferable to have the larger amount similar to the Chazon Ish's [[Kezayit]]. [Rabbi Bonder (pg 92-95) explains that if one is using hand made matzah it depends on how thick the matzah if which can be determined by seeing how many matzah are in a pound. If there's 9 to a pound, it's thin, 7.5 to a pound medium, and 6 to a pound thick. For Motzei Matzah, if it's thin, use slightly more than half, if it's medium, use slightly more than two fifths, if it's thick, a little more than a third. For Korech, if it's thin, use less than a third, if it's medium use a quarter, and if it's thick use a fifth. For Afikomen, if it's thin, use two fifths, if it's medium use less than a third, if it's thick use slightly more than a quarter.]