4mm grot with knot end

We have made this great combo!! 
4mm grot made from usa made 750 paracord with a added grab tab of 6mm paracord and a knot end. 
Perfect training tool and you can also make your own very cool colour combo .
Approx 8" tab with a choice of lengh that are approx 50/55/65/75 cm. 
A rough guide to help you make your choice. 
50cm -doberman small
55cm- mali large 
65cm- gsd/small bulldog/boxer 
75cm-Rottie/mastiff type