Vintage Inspired Knobs: So Pretty!

I bought these knobs at an estate sale this morning.  They are all ceramic and glass.  They are beautifully painted - I'm assuming by hand.  I haven't decided what I am going to use them for yet, but they are so pretty, I had to share them right away.  I have a few ideas in mind for a little DIY I could use them in... once I make up my mind, I will publish the final product!