Head Gasket Hole Sizing?

I don't know if there's any rule of thumb but I recently used a set of Mr. Gasket MLS gaskets with a bore size of 4.060 on my engine that has a bore of 4.030 with no issues. When I ordered them I was a little leery since that's only .015" per side but figured I'd check things real close and the bores were dead on center (should be since I put a ton of machine work into the block). I wouldn't bother go any bigger than 4.120 If I were you