Size: Minimum 30cm - Maximum 40cm Adjustment range: 10cm (^-^) Collar width: Approximately 4cm I made a sample and took photos of my dog wearing it once. After that, I stored it at home, but my dog has lost weight and the size doesn't fit anymore, so I'm hoping a dog who can use it will! (*'▽'*) The stainless steel hardware used was made by a metalworker who originally made it for dogs, with beautifully welded joints. (*´꒳`*) Stainless steel hardware prices have gone up, which would increase the selling price, so I don't use it anymore (＞人＜;) This cord is also no longer available, so I can't make a matching leash... But if you're okay with that, please consider it m(_ _)m *For those who understand handmade items Offered at a lower price than the order price...