Dimension --- Measures 0.78inch(2cm) width , Length : XS:9.8ft, S:15ft, L: 30ft, XL: 50ft,2XL: 65ft,3XL: 100ft.15 FT/30ft: Perfect for daily walking, hiking, Close ball play.50ft/| 100ft: Recall training, outdoor play, swimming or off-leash training.NOTE:There's a Needle on the leash to fix it,be careful when you use the leash the first time Strong & Durable --- All stitching is reinforced and the nickel plated clip swivels to resist twisting,Swivel-free clasp prevents tangling when walking or training your passionate dogs Nylon Web Rope --- Made of heavy duty 100-percent Nylon web.This check cord dog training line provide extra strength for controlling large dogs.Use as a pulling rope or dog leash extender to ensure the puppys safety when you take your puppy for a walk along the street Lightweight It trains the puppy to get used to the farthest distance from you, so when you move, memories will help him keep up to a certain distance Long Leash for Dog Training --- Long leash allows dog for more wandering area and freedom, great choice for dog training,teaching,strolling, walking, playing,camping or Backyard.NOTE:There's a Needle on the leash to fix it,be careful when you use the leash the first time