Nylon assorted colors and sizes. Measure dog's actual neck size and add 2". For in-between sizes, go up to next largest size. No. 39741: Type: Kitty, Length: 10" to 16", Strap Width: 5/8", Style: Jungle Print, Material: Nylon Thanks for shopping Hipp Hardware Plus's Online Store for all your DIY and Home Improvement needs. Remember Hipps Help!