This is the real "Grosgrain" or Petersham ribbon. All natural Rayon and Cotton. Used especially for Millinery, but is wildly popular for a tailored or casual ribbon needs. It has the horizontal ridges with the saw tooth edges required when swirling head-size bands in hats.
Sold by the yard in popular widths
#5, 20mm (7/8")
#9, 38mm (1-1/2")
#16, 51mm (2")