Leather collar for medium-sized dogs. This is a one-of-a-kind finished product. If you want a different size or color, please order from Rakuten or Yahoo! Shopping. ● Size: <BR> Leather width: 3cm<BR> Thickness: Approximately 4mm<BR> Neck circumference: 30cm<BR> **Please be sure to measure your dog's neck circumference before ordering (size with enough room for one finger). Holes are: ● 30 ● ● (1.2cm intervals) Please confirm. **Measure from the edge of the leather (not from the edge of the buckle hardware). +++++++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. The sites are Rakuten Shop, Yahoo! Shop, and the main store. * You can find Extra Heavy by searching for "collar studs" on Rakuten Shop and Yahoo! Shopping Mall.