Fits the Victorinox Classic SD perfectly. The hole is a bit tight especially the first time the knife is forced in, but there's no need to cut it larger. The tight fit is good, as the knife doesn't slide out accidentally.

I used to carry the Classic on a metal clip on my keychain. The best way to use the knife was to unclip it from the keyring. But hanging from the clip left the knife scales exposed to banging-up by my keys. This wasn't really all that big a problem, as either the Swiss Army plastic is pretty tough stuff, or my keys aren't very sharp. But the bigger problem was that I'd sometimes lose the tweezers, and those are almost as useful as the scissors.

Now that I have this case I don't use the clip, but pull the knife out of the case when needed. The case keeps my tweezers from falling out. Success!