Sometimes, you have to finish a seam allowance so it won’t fray. (Or, possibly, you’re like me and compulsively finish seams, whether they need it or not.) There are times when you can’t use a french seam, or you are working in an area too tight for a felled seam, and you want something nicer than an overcast edge. This method of finishing a seam allowance by hand will prevent them from fraying, and lightly reinforce the seam.
Pro: Historically Accurate
This is a really nice looking edge finish. It’s decorative and fully sealed. It shows up all throughout the ages – sixteenth century ruffs, smocks and chemises of all eras, even on modern blankets (of all things). It’s also a great utility stitch – milliners use it to whip wire down to buckram hat brims.