ArtMetal

If I was doing this myself, I would probably use a 2/0 or 3/0 blade, as Brad would. I've sawed hundreds, quite probably thousands of feet of cut with a jeweler's saw, so I feel very comfortable with blades as fine as 6/0. For someone unfamiliar with sawing, I think a 3/0 might, as Brad says, give you a lot of practice changing blades. A 6/0 might not even make it to the cut - you'd likely break it just putting it in the saw frame. I'm always amazed that a blade almost as fine as a human hair can be made with sharp, alternately set teeth and sell as cheaply as they do.

Brad's point about not getting water on saw blades is really spot on. I live in the tropics, and I have to keep mine oiled for storage or the salt air rusts them away. I too buy them by the gross, since I have to mail order, and since I do mostly blacksmithing these days, I don't go through them like I used to.