I found this very pretty embroidered runner at the flea market last weekend and wanted to show you how the rick rack was attached.
It's simply tacked down with a single stitch on just the top curves (the bottom curves hang over the hemmed edge so all you see is rick rack). The bottom row shows what the back side looks like.
Here's what happens at the corner turn:
This is pretty for a runner but probably wouldn't work so well for clothing—it's not very sturdy and could easily pull off with rough handling. But I love how simple it is and think of all the color combinations you could come up with!