Join Rabbi Haber's mailing list:
Home What's New Blogs Store Dedications Weekly Parshah About TorahLab Contact Us Links


Thursday, April 02, 2009

I Have to Eat How Much Maror?! and other Pesach Shiurim

There is a lot of confusion as to what the proper equivalents of the measurements necessary to fulfill the obligations of the Seder. I’d like to briefly run through them here.
These are based on the “Laws of the Seder” by Rabbi David Feinstein Shlit”a.

The Four Cups

The volume needed for each cup used for the four cups is a revi’is.  There are various ways of measuring this; for Biblically ordained Mitzvos we are stringent and require the volume of the cup to be 4.42 fluid ounces. For Rabbinically ordained Mitzvos it would be 2.9 fluid ounces.

One should preferably drink the entire cup, or at least the majority of it. If one has a lot of difficulty drinking wine he can drink as little as ¾ of an ounce, although it is preferable to drink at least a full ounce.

The wine should be drunk in under 2 minutes. At the very most it must be completed within 9 minutes.

One should use wine. The reason for this is that the Gemara specifically says it should have the ‘taste of wine’ which is understood by the Rishonim to mean intoxicating. Moreover, the wine symbolizes freedom which is obviously not fulfilled by non-alcoholic beverages.

Although wine and grape juice can be diluted at a ratio of 1:6 and still retain their halachic wine designation, the ‘demonstrating freedom’ concept discussed above would still be an issue if the wine is diluted to the point where it would have absolutely no intoxicating effect on the drinker. (This is obviously subjective). Additionally almost all wines are pre diluted and are already at least 20% water. Sweetened wines are further diluted, as are ‘light’ wines and grape juices. In fact reported that one should not further dilute Kedem light grape juice.

If one has difficulty drinking wine, they should use a small cup that holds just 2.9 ounces and drink a little more than half of it. If that is too difficult they should drink just 1 ounce or even a little less up to ¾ of an ounce. The least preferable option is to drink grape juice. Grape juice should be reserved for those whom wine would pose a health risk or would cause them to not be able to complete the Seder, even if they adhere to the above guidelines.

If no wine or grape juice is available at all, one may use ‘chamar medina’ which is something served to people as a token of honor, not just to quench their thirst. Thus tea and coffee would qualify. Rav Moshe Feinstein ruled that milk would as well, but not soda. (Other Poskim differ in this regard).


Karpas should be a green vegetable. If no greens are available any borei pri haadama may be used. (This may be why potatoes were used in Russia, but that reason is not applicable anymore and one should use a green vegetable now).

Additionally the vegetable should be raw. The reason for this is that Karpas is supposed to stimulate the appetite. The Gemara tells us that raw vegetables increase appetite, cooked ones satisfy it. (This would be another problem with potatoes).

It would seem logical that one should recline while eating Karpas but the standard practice seems not to recline.

One should dip before making the blessing.


The leader of the Seder must eat two Kezaysim, one from each of the two top Matzos. The other participants must eat one Kezayis and could be made up from other matzos if necessary.

You get two to nine minutes from the first swallow until you finish the full kezayas. It is best to fully masticate the first bite of Matzoh and then swallow so as to minimize the time of eating.

How much is a kezayis? The calculations vary from 0.7 fluid ounces to 1.5 fluid ounces. For the first nights first kezayis of Matzoh, which is Biblically mandated, one should have the larger amount – 1.5 fluid ounces. For the two kezayis rule, which is only a stringency, the smaller shiur would suffice, so 1.5 fluid ounces would suffice for that as well. This is equal to approximately 7 x 6.25 inches.


A kezayis of Maror is required. Since it is Rabbinic we can be lenient but one must have 1.1 fluid ounces of maror within 9 minutes. If one has a difficult time with this he can go down to 0.7 fluid ounces. The horseradish must be grated according to most opinions.

If using Romaine lettuce stalks one must use enough to cover an area of 3 x 5 inches. If using the leaves one must use enough to cover 8 x10 inches.


One must have a kezayis of Maror and a kezayis of Matzoh for the Korach sandwich.
One can be lenient about the shiurim – 7x4 inches for the Matzoh and 0.7 fl. ounces for grated horseradish. If one is using lettuce he should use the full amount. (because its easy).

One may rely on the lenient 9 minute time for completion of the Korach sandwich.


In order to meet the requirement of all authorities one should eat a 7x6.25 in. piece of matzoh for the Afikoman.


Posted on 04/02 at 05:56 AM • Permalink
(10) Comments
Page 1 of 1 pages

Subscribe to this blog

RSS Feed

Meet Rabbi Tzvi Hirsch Haber

Rabbi Tzvi Hirsch HaberRabbi Tzvi Hirsch Haber is sought after by all who know him for his Halachic and practical advice. His keen ability to put complicated matters into a digestible perspective coupled with his ability to get the facts, make him the perfect blogger to help us all “Do It Right”.

A native of Buffalo, NY, Rabbi Tzvi Hirsch Haber spent his childhood globetrotting with his family. His pioneering spirit first surfaced in Melbourne, Australia, where he was excited to be a member of the opening class of Mesivta Bnei Torah. From Australia the Haber family settled down in Monsey, NY. Ever the maverick, Tzvi promptly left home to study in Yeshiva Ohr Hameir in Peekskill, where he became a mainstay of the Yeshiva, and inspired his younger brothers as well as several friends from the Mesivta in Melbourne to follow him. He then joined his chaburah in Jerusalem, first at the Mir Yeshiva and then at the Bais Medrash of Rav Dovid Soloveitchik, a senior scion of the famed Brisk dynasty. As his globetrotting family returned to Jerusalem, Tzvi returned to the US, to freeze in the famed, yet comparatively chilled Beth Medrash Govoha of Lakewood.

 In 2004 he met his wife, Suzanne Schor, a native of the warmer Los Angeles climate, and the couple settled in Lakewood, where he focused his pioneering and independent strengths on the study of Halacha, or Jewish law. His innovative spirit and innate ability to help others seeking to clarify the finer points of Judaism and integrate them into their daily lives inspired his decision to commute daily from Lakewood to the Lower East Side of Manhattan in order to bask in the day to day exposure to the world renowned Posek, HaRav David Feinstein. The daily commute was more than compensated for when he received Semicha from Rav Feinstien and the Kollel L’Torah U’lhorah (a division of Mesivta Tifereth Jerusalem) in Tamuz 5768, June 2008.

In August 2009, the Habers moved west, heading toward Los Angeles where Rabbi Haber joined the LINK-LA Kollel. After being an active member of the Kollel for several years, he joined the business world, however he is still actively involved in teaching and learning in LA.

Actively involved in all aspects of TorahLab, Tzvi has taken upon himself a quasi-role as administrator of quality control and has effectively improved and upgraded many of the smaller yet vital details involved in our site. His advice is eagerly sought and gracefully given.

Rabbi Haber is now living in the La Brea section of Los Angeles with his wonderful family. He can be contacted at