I want to try to DIY as much as I can for LO's bday, so I'm trying to start early.

I really like the look of this banner, and it looks easy enough, but the one thing I don't know about is how to cut out the scalloped edges. Can I buy them pre-made? I'm afraid that if I do it with scissors, I'll make them all lopsided.

http://www.etsy.com/listing/95400382/birthday-banner-1st-birthday-banner