To make your own poly-pad rubber-band net, simply:
  loop two size 32 rubber bands (3 inches x 1/8 inch or 7.6 cm x 3 mm)
  onto one size 33 rubber band (3 1/2 inches x 1/8 inch or 8.9 cm x 3 mm)
  a short distance apart. Other sizes may be used as needed.

    

The poly-pad rubber-band net can be looped under the chin rest of small
violins or attached to the tail button of larger instruments and provides
secure positioning of the poly-pad on violins and violas of all sizes.