I am a happy customer!! Each button is 1.25", and they will be sold in packs based on series as well as individually. Pricing isn't down solid, so I'll get back to that closer to the convention. For people who can't make it to FanExpo and want some buttons, I'll try to get a store set up online so you can order some. :)
The buttons were ordered from SixCentPress.com. Great site for buttons! Located in Vancouver BC, they were quick with my order, great with communication, have an awesome print quality, and are well priced! If you're thinking of printing up buttons of your own, I highly recommend these guys!