This is a nylon neckpiece only.  It has a ring to attach a lead to.  The nylon thickness is 3/16".  It has a bead to slide down to tighten the neckloop.  It will fit an 18" head.  If you need it larger or smaller, please specify in the special instructions box.  I will need the widest part of the head measurement, usually over the ears, and the neck measurement, for a more custom fit.
Please choose silver or gold hardware, gold (brass) is additional.  
These come in a slip, kindness, martingale or martingale kindness style. Different prices for each style.