You are right, Tante Ema means Aunt Ema and "Lieblingsstücke" can be translated as favourite things. I looked it up in the internet - "Atelier Tante Ema" is a design studio from the Black Forest in south-west Germany. They are spezialized on fabrics, notions, wrapping paper, ribbons, pillow covers etc. You can have a look here:
http://www.tanteema.com/tante-ema-stoffe/
The prices for the fabrics are quite cheap, quilt fabrics made in US are more expensive (around 16 Euros per meter or even more). I have never used these farbics but what I found out they have a good qualitiy.