That puff-ball dress or any dress you don’t wear any more? Change it into a top.
On the dress, put a pin where you would like the new hem to be when it is a top. Add about four centimetres below the pin for the hem. Place the pin there. Now measure up to this pin from the bottom of the dress. For example, if it measures about six centimetres from the bottom of the dress to the pin, then cut off six centimetres from the bottom of the dress all around. After folding the hem under twice, iron it and hand-sew it. Cut across the long circular strip you cut off the bottom of the dress. Sew together the long right sides of the long strip. Pull one end through this tube until it is the right side out. Now you have a strap. Add it to the top by sewing or temporarily using safety pins. Instead maybe use the strap as a scarf, headband or handbag strap.
Depending on the new length, wear the top over opaque tights, leggings a pencil skirt or trousers.