Fitbit Alta Bands Leather, Nogis Adjustable Replacement Wristband for Fitbit Alta HR and Fitbit Alta Size: 18mm lug width. Length: 125mm-170mm(4.9inch-6.7inch). The shorter side (with the buckle) is 9cm, the longer tapered side is 11.5cm. Come with 2 pins, no need to reuse the old pins. Alligator grain and nubuck lining, matching colored stitching and stainless steel Tang style buckle. Comfortable wearing and charming looking. Made from synthetic leather, No animals were harmed in the production of this watch strap! Standard flat lug, easy to install. Strap is long enough, you can easily adjust it according to your wrist sizes. Fit for: 18mm width Huawei SmartWatch, Asus Zenwatch 2(18mm Lug),Withings Activite Pop,Timex,Seiko,Casio and More