Your dog deserves the best with a handmade slip collar from the beautiful Pacific Northwest. Our slip collars are made to order because they are made to your specific pups measurements. How to Measure? If you do not have a measuring tape, use a string & then measure that up to hard ruler/ruler app on a smart phone. First - measure around your dogs neck. Second - measure the circumference of your dogs head (top of head to chin) Order whichever measurement is bigger. Each collar is made from genuine Pendleton wool with leather accents. Shasta Slip Collar | Martingale Leather Slip Collar