A blind hem stitch can be used for many applications, such as hemming garments or curtains. It’s useful when you don’t want to see a line of stitching on the outside of the finished product.  It seems tricky, but once you understand how the fabric is folded and the basic idea behind the stitch (tacking), you’ll have it down in no time. I was working on some curtains for an upcoming post and realized I hadn’t covered this before, so I thought it was time for a tutorial.