Braided leather martingale collar with braided twists are a popular choice. Handmade from soft bullhide leather in 5/8" black. Unlike similar collars, ours are hand stitched for extra strength and durability with black stitching. Made with a 6" 2.5mm chrome martingale chain, 15" closed collar opens to 17.5". Measure your dogs head to make sure 17.5" opening will slip over the head and fit snuggly enough your dog won't slip out of the collar. Bullhide will stretch a little with use.