SPECIFICATIONUpper Layer: Fine-Grained Calfskin LeatherLower Layer: Softglove leather liningWater resistance: Splash ResistantWarranty: 12 months OPTIONAL DEPLOYMENT CLASPSUsing the menu above, you can optionally add a Hirsch Sport deployment clasp to your purchase (for compatible straps) in a either silver or gold tone. Additional costs as indicated. A deployment clasp adds quick-release functionality to your watch strap for added convenience. The Strap Size Guide below lists the currently-available dimensions of this strap. STRAP SIZE GUIDE Watch End Buckle End Thickness(Watch End) Thickness(Buckle End) Length 12mm 10mm 2.5mm 2.0mm M 13mm 12mm 2.5mm 2.0mm M 14mm 12mm 2.5mm 2.0mm M 15mm 14mm 2.5mm 2.0mm M 16mm 14mm 3.0mm 2.0mm M, L 17mm 16mm 3.0mm 2.0mm L 18mm 16mm 3.0mm 2.0mm M, L, XL 19mm 18mm 3.0mm 2.0mm L 20mm 18mm 3.0mm 2.0mm M, L, XL 21mm 18mm 3.5mm 2.0mm SL 22mm 20mm 3.5mm 2.0mm L 24mm 22mm 3.5mm 2.0mm L Length 'M' is equal to 110mm/70mm (180mm overall)Length 'SL' is equal to 115mm/75mm (190mm overall) Length 'L' is equal to 120mm/80mm (200mm overall) Length 'XL' is equal to 120mm/100mm (220mm overall) WHAT'S INCLUDED ×1 Hirsch Osiris watch strap ×1 Hirsch H-Standard Buckle ×2 Loops/Keepers ×2 Quick-Release Spring Bars ABOUT Hirsch Osiris Calf Leather Quick-Release Watch Strap in Black This Hirsch strap features an integrated quick-release spring-bar, allowing you to quickly and easily swap it out without the need for additional tools. Click here if you'd prefer this strap equipped with a pair of standard spring bars instead. A wonderfully smooth and refined strap, the Osiris has a timeless elegance that is well-suited to both women's and men's watches. The strap has minimal padding for a low-profile look that is understated, yet impressively dignified. View our full collection of 13mm straps here. Please note: Any watches pictured are for illustration purposes only and are not included. Due to the hand-made nature of these products, straps may vary slightly from those pictured.