Leather or Nylon hobbles work fine. 1 1/2 to 2" wide.

I often hang mine from the rear cinch loop on my saddle, then I always have them when I stop for lunch.

A friend put his around the horses neck like a collar.  When they get to lunch or camp, the pull it off and hobble the horse.

The Utah hobbles are basically a leather strap that does a figure 8 around the horses pasterns.  You can buy a 2" wide nylon for $10 or the 1 1/2" leather for $20.00.  Just google Utah Hobbles or Davis Tent & Awning.