If you go back to this link and select the various wristbands, head bands and bicep bands, they all vary in the width. The Bicep band is 3/4 of inch wide, where as the wrist and forearm bands are 2 1/2 inches and wider. That would be my distinction.. IMO,
P.S. I have my state meeting Monday night and will get a clarification and will let everyone know on Tuesday.