Olivery Heavy Duty Dog Martingale Braided Collar with Solid Hand Crafted Rope Leash & Training eBook Solid Quality Set Recommended By Dog Trainers And Veterinarians - Pet supply essentials for safe, effective training and everyday walking with style Made With Your Dog'S Comfort In Mind - Collar self-adjusts as pressure is applied to leash, won't choke your pooch, damage fur or cause tangles and skin irritation Unbeatable Strength And Durability - Handmade safety climbing rope with 8x braided nylon threads meet search & rescue standards. Leash is 45" length x 0.59" diameter for small, 45" length x 0.78" diameter for large. No pull collar fits neck size 13.7" to 15.7"(35cm to 40cm) for small, 18.5" to 22.5"(47cm to 57cm) for large Freedom With Control - No more twist and struggle, 360 rotatable connection for easy movement on walks & in dog obedience training class. Over 90 pages of dog training tips and techniques eBook delivered via email Quality Control And Lifetime Warranty - We care for your pet's security and safety! All products are thoroughly inspected and tested in WA, United States. Your satisfaction is the most important to us! Satisfaction Guarantee and Lifetime Warranty is provided for all Olivery's pet products