I know this is going to be an interesting discussion.
When i hear people use the word "shears" to describe something that they cut hair with, it makes me fucking CRINGE. It sounds so ugly. I know that people use the word because
1. that's what they were taught
2. they think they are being fancy
3. they think that they are using the right word
4. they aren't from America.
I've actually done some research on the subject, and here is what Wikipedia has to say about the word scissors:
"Scissors are hand-operated cutting instruments. They consist of a pair of metal blades, or tangs, connected in such a way that the sharpened edges slide against each other. Scissors are used for cutting various thin materials, such as paper, cardboard, metal foil, thin plastic, cloth, rope and wire. Scissors can also be used to cut hair and food."
and here is what Wikipedia has to say about shears:
"Although often used interchangeably with "scissors", the term shears is reserved by those in the industry for scissors longer than 15 cm (5.9 in). Others assert that scissors are symmetric whereas shears distinguish between the thumb hole and the finger hole. Like scissors, shears combine slightly offset jaws to cut material through physical shear, and combine this with levers to apply a considerable small force. Shears are usually intended for cutting much heavier material than scissors."
Most dictionary definitions of the word SHEARS includes references to sheep and/or hedges.
Now, I realize that MOST hair cutting scissors are between 5.5-6" (what PMTS calls the "work horse") but some jerks like to use scissors as large as 7", so there's THAT argument.
Most people will say something like "potAto, poTAHto", but i think if we are taught to not use words like BLEACH, DYE, PLUCK, etc, maybe we should pay attention to other words as well.
Just a thought.