[Oil Waxed Leather] For this leather watch strap.top leather is oil waxed leather (from Italy ). the character is : The strap color will become lighter when you bend it (it's not problem.Just leather's character ) Bottom leather use soft&smooth nature color calfskin . handmade-stitches (Serafil brand sewing thread from Germany) with gloss stainless steel pin buckle.[Measure Watch Lug]Choose Proper width watch strap for your watch.Before Order . Please kindly measure your watch lug width first and choose correct size watch straps. For this leather watch strap. We provides 18mm.19mm 20mm and 22mm for you to choose.[Fitting Wrist]:This is tapered watch strap . Thickness 2.7-2.9mm thickness . 22mm leather watch strap use 20mm buckle.watch strap length is 80mm*125mm(without buckle).its available for wrist length 6.89" to 8.54"approx . More colors choice .meet your different requirement .[Fitting Watches] This watch strap have more color and size . compatible with different design watches which the watch lug width matches exactly .Such as Rolex .Omega .Longines .Breguet .Rado .Tissot .Seiko.Hamilton.TITONI EDOX.etc.Please note this watch strap thickness is 2.8-3mm approx .its not available for very thick watch .[Accessories&Service]You will get watch strap *1+spring bars*4 + remover tool*1.The tool can help you to install watch straps or change buckles .If you have any questions. please contact us directly and we will reply in 24 hours .