Collar measurements are in fully open position. When measuring your dog, please measure neck size and add 2". Soft Genuine Leather Martingale Collar is the next generation of super soft and durable collars that provide exceptional comfort and support for the dog and its owner. The best feature about our Soft Genuine Leather martingale Collars is that it provides special control and most importantly safety in any situation. Super Soft Genuine Leather Choke Collars are available in a 2 earthy colors and 10 different lengths. These fine leather slip collars are made of 100% leather that can be mixed and matched with our Soft Genuine Leather Leashes.