Worn by military personal, the deBeer Military RAF Style Ballistic Nylon 2-Piece Watch Band has universal appeal for both men and women. This stylish, unisex watch band adds a subtle militaristic flair to your strap wrist watch. The vintage RAF style of this band goes well with many clothing styles and integrates easily into any wardrobe. Fit's most standared watches and many smart watches. 20mm wide where it connects to the watch. Total length is 8.5" (216mm) and it is 2mm thick. Two piece ballistic nylon with three stainless steel rings. New set of spring bars are included. WATERPROOF MATERIAL - The deBeer Military RAF Style Ballistic Nylon 2-Piece Watch Band is made of waterproof nylon. Its waterproof construction makes it an ideal watch band for everyday use. Unlike leather bands or straps, this watch band retains the class and style you want to complement your watch while providing additional durability and versatility in its use. Compatible with any traditional watch or smart watch that uses 20mm spring bars. New spring bars are included. To determine proper width for your watch, use a metric ruler to measure the lug width of your watch or the width of the current band at the point where it attaches to the watch. You can also find the width specifications for most watches by searching online.