Reply To: K'zayis Home › Forums › Yom Tov › Pesach › K'zayis › Reply To: K'zayis March 20, 2013 4:10 am at 4:10 am #1146831 playtimeMember A K’zayis is NOT the measurement of todays olive. (nor watermelon, there are different Shiurim for that, and it Does include the seed of an olive of old times (they only started the pimento thing lately)