it really depends on the airline- some of them allow you to take scissors that are 4" or smaller- some do not- some allow a nice sewing kit= some say- no needles ?!?
it's funny=
last time i flew was Delta- i was allowed to take my 4" stork scissors, my sewing kit (including needles and pins)
you can check the airline web site- they list exactly what they will not allow....and it seems that the list changes- so what may have been allowed last month may not be today- so check the list to be sure.