Sephardic Jews customarily do not give any consideration to the Noda Bi-Yehuda/Ĥazon Ish position, because their own tradition about these measurements was handed down in an orderly manner from generation to generation, without change. Even with regard to Torah commandments, they are not concerned about the Ĥazon Ish *shi’ur. *It follows that the volume of a *kezayit* does not exceed one third of a piece of machine matza (based on the position of *Tosafot* that a *kezayit* is about half an egg).

The above applies when one measures according to volume; however, most Sephardim actually have a custom to base the *shi’ur *on weight, as it is difficult to calculate the volume of each food independently to determine whether one must recite a *berakha aĥarona* after eating it. After all, foods come in all sorts of shapes and sizes: long and thin, round and square, etc. Some foods contain hollow spaces that are not factored into the volume. Thus, in order to make it easier to calculate *shi’urim*,* *the practice of measuring by water weight was adopted. It was thus determined that a *kezayit*, or half an egg, is equal to 29 grams (a more recent adjustment puts it at 25 grams). In order to eat this amount of matza, one must eat nearly a whole piece of machine matza. In other words, if we calculate a *kezayit* of matza by weight, it comes out almost three times more than if measured by volume.

This means that one must eat four machine *matzot* on the Seder night: two after the initial *berakhot*, one for *korekh*, and one more for the *afikoman* (and for those who are stringent – two more for the *afikoman*).

Yet is it clear that in principle all measurements are by volume, not weight, as several leading Sephardic *poskim –* R. Ben-Zion Abba Shaul and R. Shalom Messas – have ruled. Since the stringency of measuring matza by weight raises justifiable difficulties and consternation among many participants, we may instruct all Jews, Sephardic and Ashkenazic alike, that a *kezayit* is a third of a machine matza.^{[21]}

*maintain that*

*shi’urim*are calculated by volume. This is the ruling of

*Yeĥaveh Da’at*4:55 regarding the minimum

*shi’ur*for the tithing of

*ĥalla*. See the addendum “

*Shi’ur Kezayit*” at the back of R. Harari’s

*Mikra’ei Kodesh*part 4 and 6:3. See also

*Peninei Halakha:*

*Berakhot*10:6, 7 and the expanded notes

*ad loc*. Nevertheless, Sephardic Aĥaronim customarily calculate a

*kezayit*by weight, as Ĥida

*writes in*

*Maĥzik Berakha*168:6; see also

*Kaf Ha-ĥayim*(168:45-46 and 486:1, 3) which cites more sources. This is also the ruling of R. Ovadia Yosef and R. Mordechai Eliyahu. Some

*poskim*raise the possibility that

*shi’urim*should be calculated by weight even in principle, since perhaps volume must be calculated after the food has been compressed, and a

*kezayit*of fully compressed food will have the same weight as water. However, it is clear that the real justification for measuring by weight is that it is easier. Therefore, even a Sephardic Jew who normally measures by weight may rely on a volume-based measurement for matza. Indeed, R. Ben-Zion Abba Shaul and R. Shalom Messas maintain that one should calculate by volume

*le-khatĥila*.

Additionally, since our custom is to eat two *kezayit*-sized pieces initially, one must eat two-thirds of a machine-made matza. Even according to the weight-based measurement, two-thirds of a machine-made matza constitutes a *kezayit* according to Rambam*.*

It should also be noted that according to the latest calculations of Rambam’s opinion, it emerges that the weight of half an egg is c. 25 grams, not 27, 28, or 29 grams as calculated by those who follow R. Ĥayim Naeh. See *Peninei Halakha:* *Berakhot *10:6, 11. Nevertheless, the key point is that we calculate by volume, and by eating one third of a machine-made matza*,* one removes all doubt. See *Sidur Pesaĥ Ke-hilkhato* 2:8:4. Sephardim who eat thick, soft matza may also calculate by volume, since this is the primary halakhic method. However, it is easier to eat a weight-based (25 gm) *kezayit *of this matza. After the initial *berakhot*, when we eat two *kezeytim*, one may use Rambam’s *kezayit*, which is less than a third of an egg, and c. 30 gm of matza would suffice in this instance.