Join the curved seam that is center of our mask by placing the good sides togetherSee Good sides together in the Sewing documentation and sewing them in place.
Repeat this step for both the outer (main) fabric, and the inner (lining) fabric.
This step has no functional value, it will only make your mask look better. So if you're not too bothered about that, feel free to skip it.
Press the seam allowance on the center seam open so the seam lies nice and flat.
As this is a curved seam, it won't lay flat. But you can approach it with your iron from one side, then do the second half from the other side. Alternatively, you can use a tailor's ham or cushion to press.
Repeat this step for both the outer (main) fabric, and the inner (lining) fabric.
Now we will sew the inner (lining) fabric to the outer (main) fabric, and attach the ribbons all in one step.
As you get some practice, you will find you don't need to pin this and can just insert the ribbons as you approach a corner.
Now sew around the mask, making sure to leave one side open so we can turn the mask inside-out later.
Be careful not to catch any of the ribbons in the seam apart from where you want them to. Either guide them through the opening you leave on one side, or bunch them up in between the masks of your layer to keep them out of the way.
Actually, your mask is inside-out now, so turning it inside out will mean we get it outside-out, or regular.
Just reach in through the side your left open and carefully pull the mask through to turn it.
This step has little functional value, it will only make your mask look better. So if you're not too bothered about that, feel free to skip it.
Now that the mask is as it should be, it's time to press it. Before doing so, make sure to fold the seam allowance of the side we left open inwards, so that we press it flat as if it was sewn.
Now it's time to close the side of our mask the we left open to turn it inside out.
We are not merely going to close the opening, but also edge-stitch around the entire mask to give our mask some extra stability, and keep the lining at the back.
Make sure the open side is folded neatly inside, then edge-stitch around the entire mask.
That's it, you're done! You can now wear your mask.
Even better, make a bunch so you can give others masks too.