SWAP IN SECONDS: Quick release spring bars allow you to swap bands in seconds to compliment your wardrobe or mix and match with BARTON's other Leather, Canvas and Silicone quick release watch bands to take your timepiece from the gym to the workplace. SELECT PROPER WIDTH: Compatible with any traditional or smart watch that uses 18mm, 19mm, 20mm, 21mm, 22mm, 23mm or 24mm spring bars. Measure watch lug where band and spring bar meet the watch casing. TWO LENGTHS INCLUDED: Each band comes standard with different two lengths of the ‘long side’ of the strap (the side with the holes), assuring a perfect fit for nearly any wrist. Fits wrists 5" to 8" in circumference, but watch geometry may also impact fit. LOCKING FEATURE and OTHER ATTRIBUTES: BARTON’s proprietary locking feature assures that the free end of the strap stays securely in place. Quick release spring bars, durable silicone, solid tang 316L stainless steel buckle, scent free and dust free, 2mm taper from watch head to buckle.