According to the OU, one must eat a minimum of "approximately 26 cubic centimeters" of Matza and Marror to fulfill his requirement (ie, a kezayis is 26 cm3). They also provide a chart, which states that one must eat a piece of matzah that is "6.25 x 7 inches". Converting that to centimeters (1 in = 2.54 cm), we get "15.875 x 17.78 cm," for a total area of ~282 square centimeters. (This chart is also published by other organizations, for example here.)
What is the source for the number "26 cubic centimeters?"
Assuming that number is the total volume of a kezayit, how does the chart make any sense?
- How does one convert this 2-dimensional chart into a 3-dimensional piece of matzah?