Calico

  • 100% cotton unbleached FR calico
  • 60 x 60, 20/20.
  • 152 cm or 183 cm
  • 100% cotton heavy non FR calico
  • 48 x 44, 10/10
  • 160 cm
  • non FR curtain calico 
  • 60 x 60, 20/20
  • 137 cm
  • 50% polyester, 50% cotton FR calico
  • 60 x 60, 20/20
  • 152 cm
  • non FR Calico 100% cotton
  • 152 cm or 183 cm

60 x 60. 20/20 means there are 60 strands per inch in the warp and 60 in the weft.  The thickness of the strands in both directions is a metric 20, i.e. the yarn weights 20 m per kg.