You can get a scissors from www.Jean Lyle safe for airline security clearance. It looks like a childs paper scissors but is very sharp.
It depends a lot who is doing the security check.
I recently had a very small bottle of hand sanitizer taken away.
Its a good idea to carry a padded mailing envelope with your name and address and postage just incase you forgot something in your carry on or purse. They will mail it for you..