a cable cut 42" long will make a aprox 12" loop . Then just add , to what you want.
I use a 1/16" x 48" 1x19 snare with a 3/32" x 72" extension cable,swiveled ,Slim Lock. (where legle) To snare Beaver,Coyote, Red Fox,Gray Fox,Coon, Bobcat.I would use the same snare on Fisher if I ever had the oppournity to snare them.