This is a 2.5cm wide leather collar for small dogs. The width provides strength. This is a one-of-a-kind finished product (sample) and is a bargain. If you want a different size or color, please order from Yahoo! Shopping. ● Size: Leather width: 2.5cm Thickness: Approximately 3mm Neck circumference: 26cm **Please be sure to measure your dog's neck circumference before ordering (size with enough room for one finger). Holes are: ● 26 ● ● ● (1.2cm intervals) Please confirm. **Measure from the edge of the leather (not from the edge of the buckle hardware). +++++++About Extra+Heavy+++++++ I have many other items for sale, so please take a look. Extra+Heavy is a handmade collar shop that specializes in custom-made collars, including half-choke collars and leads, mainly for bulky collars for bull breeds 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.