Measuring With or Without Seeds: Yuma 79a
As the legal borderline for consumption which provides Mental Satisfaction [Yishuv HaDaat]: Yuma 79a, 80b
As the legal borderline for the prohibition against owning/consuming Leaven on Pesach: Yuma 79b; Pesachim 50a; Beitzah 2a, 7b
In Relation to the Egg Amount: Yuma 79a-b