kashrut kosher - How big, and what exactly, is "Kedei Kelipah"?

{Kedei Kelipah is a term used in Kashruth for the amount of something that needs to be removed in order to allow one to treat the remnant as Kosher. (This only applies under certain conditions, which are outside the scope of this question - at least I happen to believe it is outside the scope of this question, but feel free to bring it into your answer if you think it is necessary.)}

---

What exactly is a Kedei Kelipah, and how big is it? How does one remove it, and how does one remove it if the item in question is very thin itself?

Answer

It was explained to me as a single layer thick enough to peel off in one piece. (See Kaf Hachaim (Sofer) Y"D 91:32- ושיעור כדי קליפה היינו שתהא גסה קצת כדי שתוכל להנטל כולה כאחת)