PERFECT FOR ALL LARGE BREED:Neck:16’’-25’’. It fit most of large breeds dogs, including Collie,Labrador Retriever,Wheaten Terrier,Akita,Bernese Mountain Dog,Bulldog (American),Bulldog (English),Doberman,German Shepherd,Australian Cattle Dog,Bloodhound,Great Dane,Rottweiler ,etc. Please carefully check the size chart, then choose the right one for your babies. SOFT & COMFORTABLE: Dog collars is made of soft premium polyester and padded inner by Neoprene that hugs the dog’s neck softly, reducing absorb the shock when wearing or pulling. With soft padding on the throat area for additional dog comfort. HEAVY DUTY BUT LIGHTWEIGHT: We choose light Aviation Aluminium as the attachment, which makes the collar very lightweight. Won't become a burden on dogs, is your best choice for dog training, walking, outdoor activities etc.