I have read Eiseman and have, of course, seen various methods of determining compatibility with a keris in numerous other books and pamphlets. I wonder how often the final determination works out the same when using different systems on the same keris and person?
These methods are definitely good keris lore, but they seem a bit arbitrary. And in what context does checking for this compatibility occur? Many keris are made specifically for their owners. Certainly when made to order they would be created to proper specifications. But if a keris was being past on to your as pusaka or gifted to you suppose one might want to check for suitability. Though it must be awkward to refuse your family pusaka because it doesn't measure correctly by your thumb.