I made this one yesterday. Took 14 yards so its not super duper full. but its full enough as you can see for her
Theres a place called Magicmakers or something on line that sells nylon chiffon for $2.25 a yard.
I just used cotton thread on top and bobbin.
To gather the fabric I turned my tension ALL the way up and then lengthened my stitch length all the way out,. it gathered the fabric on its own