Martingale Dog Collar. This martingale dog collar was made with the wide side step design by Joe Clegg. Any wide pattern bracelet design will work to make this collar. This style of collar works like an adjustable collar and is great for a dog who can slip out of its collar. Is is made of 550 Paracord along with two D rings and one O ring. The 550 cord is available in over 1,000 colors and patterns. For a small dog or cat you could use any of the smaller cords like type 1 (aka 95 cord), 275, 325-3, or 425 cord which comes in a variety of colors.
$4.99--550 paracord/100 ft in 1,000+ colors/patters, 90%+ USA made at https://paracordgalaxy.com/ or 550 paracord page https://paracordgalaxy.com/19-550-paracord-550-cord
Paracordgalaxy.com also offers a variety of free printable tutorials on its tutorials page at https://paracordgalaxy.com/content/20-how-to-make-a-paracord-bracelet