Dickies Icon Pet Collar, Large, Black Nylon Webbing; Nylon and Reflective Thread; Twill Fabric Plastic Buckle Clip; Customized metal hardware Adjuster with knurling D-ring 15" - 25" L x 1" W 3rd party safety tested; reflective nylon webbing Nylon Webbing; Nylon and Reflective Thread; Twill Fabric Plastic Buckle Clip; Customized metal hardware Adjuster with knurling, D-ring 15" - 22" L x 1" W 3rd party safety tested