How Much Bread Requires Washing with a Brachah?

Shiurim (Quantities) of Bread for Washing, Hamotzie & Bentching

A person should wash their hands for bread and make the brachah of hamotzie even if they eat a quantity as little as a crumb. However, they should make the brachah of al netilas yadayim only if they will be eating a shiur of a k’beitzah (the volume of approximately one egg). Each kezayis (approximately the volume of half an egg) of the k’beitzah has to be eaten within kedei achilas pras (the amount of time it takes the average person to eat a piece of bread equivalent to approximately three eggs), or within approximately four minutes—the first kezayis within kedei achilas pras, and the second kezayis within another kedei achilas pras. The two kezaysim—totaling a k’beitzah—should be eaten directly one after the other with no interruption. However, Birchas Hamazon (bentching, the Grace after Meals) is said even if one only eats a shiur of a kezayis within the timeframe of kedei achilas pras. #368

https://halacha2go.com?number=368

Practical Halacha: One minute a day. By Horav Yosef Yeshaya Braun, shlita, Mara D'asra and member of the Badatz of Crown Heights.