SWAP IN SECONDS: Swap daily to compliment your wardrobe or mix and match with BARTON's leather & silicone quick release bands to take your timepiece from the workplace to the gym. Simply slide quick release knob with finger as shown in diagram. SELECT PROPER WIDTH: Compatible with any traditional or smart watch that uses 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, or 24mm spring bars. Quick release spring bars are included with and integrated into the band, so it is important that your watch's lug width matches exactly. Measure width where band meets the watch casing. You can also find the specifications for most watches by searching online. SMART WATCH WIDTHS: 22mm - Gear S3 Frontier, Gear S3 Classic, Galaxy Watch, Galaxy Watch 3, Fossil Gen 5 Carlyle, Fossil Sport :: 20mm - Galaxy Watch 6, Galaxy Watch 6 Classic, Galaxy Watch 5, Galaxy Watch 5 Pro, Galaxy Watch 4, Galaxy Watch 4 Classic, Galaxy Watch 3, Gear S2 Classic, Gear Sport, Galaxy Watch, Gear Sport, Galaxy Watch Active, Galaxy Watch active 2 PREMIUM MATERIALS: Cotton canvas is durable, soft, breathable & machine washable with embroidery added for strength & style. 316L surgical grade stainless steel buckle with solid tongue. 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.