Comment by xxs

>Whether they are allowed or not, probably depends on the place.

It's a EU thing, even though the Swiss are outside... and I was sure it was a directive until:

The recommendation allows for light knives and scissors with blades up to 6 cm (2.4 in) but some countries do not accept these either (e.g. nail care items)[citation needed]

I thought it was universal mostly since I had no issues at the airports.

Prior to the 6 cm rule, once I had to run to a post office at the airport and mail a parcel to myself with the pocket knife (which is also a memento)