Sephardic Jews customarily do not give any consideration to the Noda Bi-Yehuda/Ḥazon Ish position, because their own tradition about these measurements was handed down in an orderly manner from generation to generation. Even with regard to Torah commandments, they are not concerned about the Ḥazon 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 by volume; however, the custom of many Sephardim is to measure the **shi’ur **by weight, as it is difficult to calculate the volume of each food independently to determine whether one must recite a **berakha aḥarona** 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.

Accordingly, one must eat four machine **matzot** on the Seder night: two after the initial **berakhot**, one for **korekh**, and one more for the **afikomen**. Many Sephardim do so (and some are stringent and eat two **matzot **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]}

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

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

**shi’ur**for the tithing of

**ḥalla**. 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

**Harḥavot ad loc**. Nevertheless, Sephardic Aḥaronim customarily calculate a

**kezayit**by weight, as Ḥida writes in

**Maḥzik Berakha**168:6; see also

**Kaf Ha-ḥayim**(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 practice of measuring by weight was adopted to make calculations easier. Therefore, even one 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-khatḥila**.

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 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. Ḥayim 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 Pesaḥ 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.