How to sew a narrow bias edge
I had a busy yet productive weekend – not only did I finish my Colette Patterns Beignet skirt, but I also made the Patrones 292 sleeveless bias cowl top, too! I didn’t have enough time for a photoshoot over the weekend, but I did remember to finally document my favourite way of finishing the edges of thin blouses like the cowl top so I can finally share this with you.
This technique is great for necklines and armscyes on sleeveless tops, and is my preferred way to finish any kind of blousey, lightweight fabrics like silk satins and the viscose (rayon) you see here. You get a thin, finished edge that looks good inside and out with a minimum of fuss, and you don’t have that awkward problem of facings flipping out or anything, either. As long as you’re okay with a small amount of topstitching on the right side, this is the technique for you…
So before we begin, sew one of your seams so you’ve got a C-shape. If you’re finishing a neckline, this means you sew one of the shoulder seams. I’m finishing the armscye of a sleeveless blouse here, so in this case I’m sewing both shoulder seams, leaving the side seams free.
Cut out a bias strip that’s the length of your opening edge, plus a few centimetres just to be sure. For the width, I prefer a finished facing of just 1cm, so my width here is 1cm + (2× 1.5cm seam allowances) = 4cm.