A while back I posted a tutorial on how to make a custom fit martingale for your dog. Making an adjustable martingale has a little twist to it and this tutorial will show you how to make an adjustable martingale, which is handy for owners that have a growing puppy.
The tools & supplies needed for this project are pretty simple. You will need some 1″ webbing, a pair of scissors, a measuring tape, a D-ring, three sliders and a sewing machine.
If you can’t find the sliders, metal O-rings or D-rings will do just fine. But you will need a plastic slidelock for the adjustable part of the collar.
Some sources that I use for hardware & supplies are
cdwplus & strapworks