Place your plain fabric good side down (if applicable) on the printed piece.
Holding the elastic in place, carefully remove the pin and re-pin through all three layers.
Making sure all the elastic is tucked in, place a pin about halfway across the top edge. This is to remind you which the top is.
Starting about halfway on the bottom edge, start sewing a straight seem (backtracking over the first couple of stitches to anchor it) around the edge of the mask. I like to align the edge of my presser foot with the edge of my fabric.
Be very careful not to sew through the elastic at any point other than the corners. You may need to carefully reach in between the fabric to coax fabric away from the seam you are sewing at the time.
As you come close to each corner, drop your machine needle, lift your presser foot, and pivot your mask before continuing.
As you approach the starting point, stop your seam 2-3" away, backtrack to anchor your seam. Remove from sewing machine, trim your thread ends.
Trim your corners - being careful to not cut too close to the seam - and set it aside for now.
Use your wire cutters to cut a 5.5 “ length of florist wire.
Use your pliers to bend the very end of the wire backwards - as small a length as possible.
Squeeze the bend to flatten it as much as possible.
If your wire is bent at all, try to straighten it out as much as possible.
Set your sewing machine to a wide zig zag and relatively short stitch length.
Center your wire over the top - complete - seam, hold in place.
Starting on the inside of one of the wire ends, CAREFULLY AND SLOWLY zig zag over the wire, close to the original seam. Be sure to keep the wire centered under your presser foot, and remember to anchor both ends of the seam with backtracking.
Trim your thread ends.
Carefully turn the mask right side out. I like to reach in and grab one end of the wire and gently coax that out - keeping it as straight as possible - before tugging at the elastics to get the corners out.
Smooth everything out, ensuring that the corners are fully popped out and seams are centered on the outer edges.
You can iron it at this point if you like - I’m too lazy to, to be quite honest.
Pleat the mask 2 times - folds pointing towards the bottom of the mask - using whatever pleating technique you like.
I basically just freehand it on one side, then more-or-less match on the other side. You may be more fastidious with it than I am :)
Iron the pleats if you’re into that sort of thing, and pin into place.
With the right side facing up, start sewing a straight seam around the edge. I like to do this at about “edge of the presser foot” on the short sides, and a bit closer on the bottom edge.
As you approach the open section of the bottom edge, tuck the raw edges in, lining up the ends of the seam, and sew it closed.
As you start the final - top - edge, be sure that the outer seam is centered on the actual edge, and sew a wider seam - edge of presser foot or a bit wider - keeping the wire enclosed and away from the seam you’re sewing.
End seam at the first corner, backtrack to anchor, and trim your threads.
Bend mask wire at the mid point of the mask - I like to do this over a finger, to keep the bend rounded.
Bend back the sides of the wire a bit, to flatten the mask and prepare it for wearing.
To wear the mask, center it on your face and pinch the wire to mold it over your nose. Smooth the ends of the wire over your cheeks to customize the fit.