Start up company, and yes using your labels- which are super easy to pick out, and even using your simple suggested software. As fussy as making one label at a time is, I have a website, an etsy site and am selling product locally. I get labels in a couple days, and the software is great.
I have to make ends meet, even used other sizes and cut them up to fit my projects, as I can't always determine the best size until I buy all my packaging.