Speidel has been an industry leader, supplying replacement watch bands for over 40 years. A recent change in ownership of the company is resulting in a renewed focus on innovative designs, new world technology, and old world tradition. Speidel's line of wide watch bands have been popular with owners of all major brands and other oversized watches. Of course, Speidel is best know for its line of Twist-O-Flex expansion watch bands. Expansion watch bands allow you to revitalize an old watch or replace a broken watch band without spending a lot of money. Our selection of expansion bracelets includes Speidel Twist-O-Flex and Timex, two of the best known watch band brands in the world. Adjustable Width: Adjustable end pieces on both Speidel and Hadley-Roma expansion watch bands allow them to fit a range of lug widths as indicated in the product details. Length: Speidel recommends that all length adjustments be performed by a trained watch technician and cautions that attempting to adjust the product by yourself may void the manufacturer's warranty. However, if you choose to adjust your band yourself, refer to Speidel's website for a sizing guide with animated, step-by-step instructions. Click here to view Speidel's Online Sizing Guide. Adjustable Width: Adjustable end pieces on expansion watch bands allow them to fit a range of lug widths (as indicated in the product details.