“What size is 0/S in American hat size?”

Asked by rjmellor from Illinois on 11/19/2016 4:11:11 AM
  • I believe it is a "one size fits most" designation
    Answered on 11/21/2016 9:14:39 AM by g in nh from Wellfleet
  • O/S indicates "one size fits most".
    Answered on 11/21/2016 9:39:09 AM by Product Specialist Greg from Sierra Trading Post