From a vintage baby pillowcase. Two rows of white rickrack attached along the edge with tiny tacking stitches at the points. It gives the illusion of crocheted or lace edging without being too frilly.
Updated on 7/2 to add this photo of the back so you can see how the rickrack has been sewn on.
Rickrack flowers that I found in a bag of vintage sewing things at the flea market. The points are gathered and tacked through to the back with tiny stitches to hold them in place.
A closeup of the back in case you want to try it for yourself. These would look cool combined with embroidered (or appliqued) leaves, maybe on a bag or clutch.
For those of you just discovering my blog (thank you Craft: magazine!), I did two posts about rickrack last year. You can find them here and here.