When real things happen to imaginary people

take the pattern piece for the back (which is half back because it either lies to fold or to seam) Trace shape onto bit of lining paper or plain wallpaper so you don't spoil original pattern. Decide how far apart you want your hoops and draw lines across your new pattern that distance apart. Measure the first line, multiply by 4 and cut piece of rigiline to length, repeat with next line, and then next til you have a piece of rigiline for each line, join into hoops & space apart with ribbon at distances marked on your pattern