Rectangular Stickers

[Frater Theodbald]

Ok, so I've been looking into making my own stickers and having them printed out.  So far, I have two working models.  Am I doing this right ?  Any suggestions ?

Also I do not have photoshop, so I'm not very fancy and 2nd, I want to keep them black and white so as to minimize printing costs.  The QR code directs to this website and I am told it works.  I think keeping the QR code on there is important.

Cheers !  Examples below :

[The Cusp]

You might want to look into Inkscape
http://www.inkscape.org/en/

It's free, simple, and pretty much the "go to" tool most people use for vector graphics, which is what give you nice clean lines and curves.