We love and use this lead daily for agility training/competing/walking with our dogs as it goes on and off nice and quick!
 
Collar section is approx 25mm wide with the option of added sparkle. 
 
This is a slip collar and lead, it can only tighten so far due to the design of the collar/lead to prevent over tightening on the dog's neck.
 
It is lined/padded with soft fleece on the collar part and the handle of the lead.
 
The approx length of the lead is 40"
 
There is a choice of neck sizes for this lead.