I to a sweater that I have had for years and cut off the bottom just under the armpits.
Serge the raw edge. Fold & pin.
Turn under the serged side and sew along to finish off the bottom edge.
I gathered down one side using a gathering stitch from the top to the bottom.
Sew it with a regular 2.5 stitch to secure it.
I took about a yard of black satin ribbon and gathered down one side.
Then wrapped it around into the shape of a flower. Sewed through the center to secure it.
Then added some left-over sweater piece for the center of the flower. And finished it off with some beads.
I can't wait to wear it with the new black dress I just bought!