EASILY SWAP: Swap bands daily in seconds to compliment your wardrobe or mix and match with BARTON's Top Grain Leather Quick Release watch bands to take your timepiece from the gym to the workplace. Simply slide quick release knob with finger as shown in diagram. SELECT PROPER WIDTH: Compatible with any traditional or smart watch that uses 16mm, 18mm, 20mm, 22mm or 24mm spring bars. Measure watch lug where band and spring bar meet the watch casing. It is important that your watch's lug width is the exact width of the band you select or spring bars will not fit correctly. You can also find the specifications for most watches by searching online. After determining proper width select the corresponding width from the menu above. Please measure carefully. SMART WATCH WIDTHS: 22mm - Samsung Gear S3 Frontier, Samsung Gear S3 Classic, Samsung Galaxy Watch, Samsung Galaxy Watch 3, Fossil Gen 5 Carlyle, Fossil Sport :: 20mm - Samsung Galaxy Watch 6, Samsung Galaxy Watch 6 Classic, Samsung Galaxy Watch 5, Samsung Galaxy Watch 5 Pro, Samsung Galaxy Watch 4, Galaxy Watch 4 Classic, Samsung Galaxy Watch 3, Samsung Gear S2 Classic, Samsung Gear Sport, Samsung Galaxy Watch, Samsung Gear Sport, Samsung Galaxy Watch Active, Samsung Galaxy Watch active 2 IDEAL COMFORT & PERFECT FOR FITNESS: Textured back prevents slipping, improves comfort and airflow; Waterproof and washable (eliminate stink!) ; Perfect for fitness and active lifestyles (#gainz). OPTIMAL FIT: Approximately 8" total length when not attached to watch; Designed to fit wrists 5.75" to 8", but watch geometry also impacts fit.