This is a 4cm wide collar for large dogs. This is a one-of-a-kind finished product, so if you want a different size or color, please order from Yahoo! Shopping. Leather width: 4cm Thickness: Approximately 4mm (may vary slightly depending on the leather) For dogs with a neck circumference of around 44cm **Please be sure to measure your dog's neck circumference before ordering.** ● ● 44 ● ● ● (1.2cm spacing) (Please consider the last hole as a decorative hole) We will make the holes as shown above, so please confirm. +++++++About Extra+Heavy+++++++ Extra+Heavy is a handmade collar shop that specializes in custom-made collars, including half-choke collars and leads, mainly for bulky collars for breeds like bulldogs and long-necked dogs like Italian Greyhounds. Our sites are Rakuten Shop, Yahoo! Shop, and our main store. * You can find Extra Heavy by searching "collar studs" on Rakuten Shop and Yahoo! Shopping Mall.