I thought these measurements were hotly contested by the rabbonim; am I remembering incorrectly? And if so, how do you find out in advance which rabbi this tape holds by?? What problems we have! :P
This reminded me of the matzah size charts that were floating around my prior community this Pesach. I couldn't find the same one online, but I found a different one. I understand rabbis hold differently on these sizes, but how can you resist adopting a rabbi's halachic position when it's laid out in such a visually-pleasing and easy-to-understand way??
The lesson to you conversion candidates: just because you read something doesn't make it gospel. I'm not saying these are incorrect. In fact, I'm sure they're correct according to some very illustrious rabbi, but that doesn't mean there aren't different interpretations of the same halacha.
As another example, I got the Parve-O-Meter app for my new iPhone. (The Crackberry may rest in pieces.) It tells me that the "prevailing custom" is to wait 6 hours between eating meat and dairy. Yes, I'd agree that's "prevailing." It also says that the "prevailing custom" is to wait 1 full hour between eating dairy and meat. That, I would NOT say is prevailing custom, or even common. Some simply wash out their mouths after the dairy. (Remember that hard cheeses are a different story.) The app recognizes this to a degree because you can adjust the preferences for the dairy-to-meat waiting period at 0 minutes (but says you must eat crackers in addition to washing out your mouth), 30 minutes, and 1 hour. However, it doesn't allow the same variation in custom for meat-to-dairy: "6 Hours For Everyone" is what it says.