You could make this out of some bin bags, with a strip cut off for use as neck ribbon (the ribbon can be stapled on, with the ends of the staples on the outside so as not to scratch or damage clothing). I‘m not cheap though! I used 2.5m of satin which is enough “wing” for a teenager or a small mum. For a tall adult, 3m would do.
For good shimmer, use the smoother, shinier side of the satin as the outside of the cape.
I actually made 6 of these for a show at my kid’s school using the instructions provided by another mum. I was impressed by how effective her design was and thought it might help some rushed soul out there if I prepared these instructions.
You will need:
• 2.5m of a black fabric, preferably satin. The width of the fabric (here 150cm) is your centre back
• 80cm – 1m of black (satin) ribbon, at least 2.5cm wide
• Pinking shears
1. Fold your fabric in half along long side and cut out a small quarter circle for the neck and a larger quarter circle on the other side. When opened up, the fabric should look like the above diagram. The distance from A to B (the diameter of the smaller circle) should be about 12cm or you could work out your own using this formula:
Diameter = Neck circumference ÷ Π.
For cutting, use pinking shears if possible so as to eliminate the need for hemming the bottom of the cape (this would take a while).
Otherwise, you can keep the selvedges and save yourself some time.
3. To shape the cape, add two darts, both placed 8cm away from the centre back. Press towards centre (on low heat!). This gives the cape a nice squared off back.
The ribbon should thus form a kind of small collar.