Ms. Williams only uses this type of head collar in her practice for >25 years due to their superior performance and fit. A Snoot Loop is designed to fit very small to very large dogs, including special "B" type that fit short nose breeds comfortably! "B" type have a center head strap that keeps the nose loop in place for short nose breeds. For online information on fitting, and training using a Snoot loop head collar: click here. To download and print a .PDF for fitting and training using a Snoot Loop head collar: click here. For discounts on >10 Snoot Loops or for help with international shipments contact us! click here The Snoot Loop head collar is the best type of head collar to give you easy, gentle control over your dog. The custom fit means your dog is comfortable and able to pant, eat, play and drink normally. Attaching a leash to the ring under your dog's chin, guides the head giving you the ability to stop your dog from pulling, lunging, barking, and biting. To order consult the size chart below and then select your products. Thank you! Snoot Loop Sizes & Samples of Breeds ("B" type for short-nosed breeds) Neck loop circumference Nose loop circumference Shortest Length Longest Length Without knot With knot LARGE: very large breeds, or large heads ex. Mastiffs, some Pits 13 in 30 in 22 in 17 in MEDIUM: large breeds ~ 40 to 90 lb. ex. Shepherds, Labs, Aussies, Pits Medium"B": ex. Bulldog, some Boxers 11 in 25 in 19 in 14 in SMALL: small-medium breeds, Cocker, Sheltie, Beagle, small terriers Small "B": ex. Pug, French Bulldog 9 in 23 in 17 in 11 in PETITE: smallest breeds Dachshund, Toy Poodle, Chihuahua Petite "B": ex. Boston Terrier 6 in 15 in 13 in 9 in Due to COVID delays, it is advised that you add insurance to your products if ordering less than $50.00 worth of merchandise. Otherwise if your product is lost or delayed, the seller is not responsible for the cost of the lost or delayed item or shipping!