13.5'-18.5' neck x 6/8' width with strong 100% Nylon fabric. that is soft, smooth, and doesn't easily fade. We follow the AATCC color fastness standard. Machine or hand washable in cold water only. Wash with like colors. The reinforced stitching is strong and durable. All sewing joints are folded over making them smooth. This allows more comfort to you and your furry friend during use. Our collar is made for training and daily use. Please ensure to adjust the collar to best fit your furry friends neck. For maximum comfort, we recommend a minimum of 2' (about 2 fingers) of slack between collar and neck. The martingale collar is sold separately at the Hyhug pets store. If you need dog leash(B07DLTVXFM)&(B07DMDY46J) ,please visit Hyhug pets store. Our quality is guaranteed. If you are not 100% satisfied with the product we will provide customer service, refund, or new product.