This is really fun, and honestly, large blouses will probably always stay in style. Perfect for ladies with curves because it won't accentuate any you wouldn't want to show.
Mine is with a stretchy belt. I'm still considering whether or not i want any elastic around my waist...
Get a big square of fabric (folded in half, inside out) measuring about 23"(This can actually be as wide as you wished - i just found the fabric on clearance!).
Measure from shoulder to shoulder. Find the center of the top fold and mark half of your shoulder measurement to the left and to the rihgt (to total your measurement and keep everything centered)
Also mark about 4" below the center spot (or where you would like the neckline). Trace around these marks for the neckline. Cut, leaving room for hemming.
Also measure around your waist; divide this measurement in half, since your fabric is doubled. You will divide this measurement in half once more and mark to the left and to the right of the center. Pin down.
Measure from shoulder to waist. Use this to mark where your sleeves will be. Mark with pins.
Where the pins meet, there will be two voided areas (red) created. Cut this out, leaving hem room.
Sew together the two pieces around the waist and under the sleeves. This is denoted by the blue lines.
Hem around the sleeves and the neckline, making sure not to close the holes!!
Turn the shirt right side out. Measure from the side of your breast to your waist.
Using this measurement, mark from the corner where waist meets sleeve till the length of your measurement. This will close the sleeves so you won't show bra AND helps the shirt look more form fitting. Do this on both sides.
Your shirt is officially finished. All you've got to do is accessorize, like I did with the belt!