I think you mean on the cruise ship but just to clarify- these are NOT allowed on carry ons on the flight. Granted it's a YMMV thing though because I have flown oh probably 5 times in the last couple of years and each time I have brought my teensy tiny sewing kit with scissors that are no more than about an inch and a half long... but this last trip I took with the kids they noticed it in the carryon (I think it's because I didn't have nearly as much stuff packed for our short trip and therefore it was more noticable?) and they made me open it and confiscated my tiny scissors. I couldn't believe it!