Making My Own Tags

[lower-class.livejournal.com]

I make a lot of jewelry...and I plan on selling it soon at the flea market...this summer hopefully.
Anyways my problem was I had no way to mark how much each item was. I was using address labels, the kind that come 80 to a sheet, but I found they came off too easily.
I was looking at the tags you can tie onto each piece, but I have close to 300 things to sell, so that would not be a vey cheap thing for me.
My question is...what would work best to make my own tags?
Scrapbook paper seems to flimsy...
Would cardstock work?
Does anyone have any experience with making their own tags?

And I would like to do something simple and basic to them to make them pretty..so people remember.
Should I make them in a variety of shapes?
I could use glitter and stickers..heh...I'm getting excited.
Any info or tips would be nice.
Thanks!!