About Thick Oil Top Grain Leather Watch Strap: Our strap is made of high-quality first-layer calfskin. The raw materials are very environmentally friendly and have no odor. Because of the high toughness, there is no need to worry about the surface breaking due to bending. No matter when,the strap can maintain delicate and comfortable touch and beautiful appearance,it is a classic style strap suitable for various occasions. If scratches appear on the strap, simply wipe them with a soft dry cloth and the scratches will disappear. ATTENTION: For the service life of the strap, please do not let it come into contact with water too much. How to Choose the Watch Strap: Band Size: 20/22/24/26mm Band Color: Yellow-O/Black-C/Green-C/Brown-C/Grey-C/Yellow-T Buckle Material: 304L stainless steel There are 4 sizes in 6 colors for selection.Before you purchase, please measure the width of the lug width of the case, or check the product specifications of the watch. Some straps will be marked with a number indicating the width on the back, you can choose the appropriate strap by the above 3 methods. How to Install the Watch Strap: It is easy to install, and it only takes 3 steps to complete the assembly of the strap and put it on your hand smoothly.1.Put the spring bars included in the package into the holes at both ends of the strap. 2.Adjust the angle and put the spring bars at both ends of the strap into the junction between the case and the strap. 3.After checking whether the spring bars is firmly installed, adjust the length with the pin buckle according to the size of your wrist.