If you're looking to be a creepy, blood-covered barber, Sweeny Todd is a good choice. (I love this movie).
I found not only one costume, but two different costumes for him on Amazon.
If you don't have a prop straight edge razor and you don't feel like ruining your barber shaving mug with fake blood, Amazon does have a bloody straight edge razor and bloody shaving mug set.
Not creepy enough? How about the Barber of Sever? I prefer the look of the straight edge razor instead of the large knife, but the blood on the barber jacket is a nice touch.
Thankfully, I like my barbers with crew cuts and other very short haircuts, so if I saw the this barber in a shop, I would back out quickly and run away.
Now if creepy and bloody isn't your thing, how about classic? I so love the look of the barbers and hair dressers in the 1950s.
Here's a classic white barber jacket with buttons. (Oh, I'm giddy already).
Yes, there is a female version of this. Just forgo the hat, and instead of slacks, wear stockings and heels instead.
That hair dresser uniform is quite similar to the ones that I own. :)
To add some uniqueness, you can always wear your hair in curlers. If you can't put rollers in your own hair, how about a wig with curlers in it?
Otherwise, if you just want to do something very simple, a hairstylist apron will work too. I suggest pairing it with a paddle hair brush or portable clippers. This way if you're out at a Halloween party, and if a drunk needs to be taught a lesson, you have your punishment tools ready. ;)
Of course, we can kick that up a notch, if you want something a bit more bad ass. Think 'Beauty School Dropout' from Grease.
Or perhaps you want to be the client in the salon chair? How about being one of the clients with a roller set in Glee's version of Grease?
Oh, one more thing, since I've noticed people telling me that I should shave my own head for Halloween. So many costume ideas for that! Any famous bald celebrity or movie character. But since I'm not going to shave my head, a bald cap should work.
What are you dressing up as for Halloween?