Dog Head Collar Halter Black 6 Sizes SNOUT CIRCUMFERENCE SHOULD BE MEASURED 1.5-2 FROM THE TIP OF THE NOSE. IF IN DOUBT PLEASE SELECT SMALLER SIZE. Available in 6 sizes. Please use Sizing Chart for Size/Breed Reference, Snout and Neck circumference, and Loop size. For size Large the Loop size is 8"-14", designed for snout circumference 10.25"-12.25". Nose strap layered with soft neoprene for added comfort. Made of soft strong high quality 3/4" wide nylon. Easy to use well designed durable head collar provides control to stop pulling, jumping, lunging. Allows freedom to pant and yawn.