Measure the length of the metal part and cut a strip about twice the length of the hook and 1" wide. Fold in half and stitch down the middle, turn inside out and stitch up one end. Thread on to the hook and stitch the bottom to the padding to stop it falling off!
Then back to the main hanger part - fold the fabric in half and using a running stitch stitch about a 1/4" stitch 1/2" apart and work your way to the center. Thread the coat hanger in and pull the tread to gather it. Carry on sewing but this half you will have the hanger in the fabric. At the end gather again and secure the thread. Add a ribbon if desired. Hope that all makes sense!
If you make one PLEASE let me know I love seeing other peoples creations!!