Material:nylon rope; Crafted from strong reinforced braided nylon polyester for durable use. Color:Random color; Standard Shipping: usually 10-17 Working days after it shipped. But there is no such option for us to choose in Amazon's System but '17-28 days'. So you will find the Estimated Delivery Date too long. In fact it is not ture.If it is busy season, the logistics may be delayed. Size(cm/inch):S-0.8*120/0.31*47.2; M-rope:1*120/0.39*47.2; L-rope:1.5*115/0.59*45.2; XL-rope:2*115/0.78*45.2; Different size: suitable for ALL sized DOGS - Ideal for X-Large, Large, Medium but can be used for small dogs who like to roam because it is lightweight yet a very strong leash. It is a double dog leash that relieves the stress and tangles that come along with walking both of your dogs at the same time.