The product is an Apple Watch Nike Sport Loop band in the color Obsidian Mist, made of nylon material. It is designed for various Apple Watch models. All watch bands have the width of the band marked on the band however, the location of the marking will vary depending on the material of the band.The widths include: 38mm, 40mm, 41mm, 42mm, 44mm, 45mm, 46mm or 49mm.
eBay