The rules have relaxed a bit here in this country regarding sissors and knives, but the rules from the country you will be returning from are all over the place. One Country took my mom's stitch savers ( used in knitting) they let her keep the knitting needles but took the stitch savers.... so there really are no hard and fast rules in other countries.. and it is very prone to on the spot decisions that can vary from one passenger to the next.
Here you can take small sissors, blades under 3 inches ( I think , mine are only 1.5 inches ,so I am not 100 percent sure of the exact limit to blade lenght).
On one recent flight a passenger raised a really loud and obnoxious issue about my 83 year old mothers knitting needles...it was to the point of humiliation. The flight attendant did finally come and set the passenger straight , and my mom kept her knitting needles , but was very very embarrased and upset.