Description:1. Choose the right size of the buckle, the direction of the arrow is the watch cover. Open the small chip in the center of the buckle to adjust the length of the strap. Just suitable for metal straps.2. They are made of stainless steel with PVD coating that is rust-resistant, strong and durable for stable connection with both sides of the watch band.3. for 18mm width watch strap. Measure width from side to side where the buckle attaches, notice that many watch bands have a taper and are narrower at the end where the buckle attaches than at the end where the watch attaches.4. Please confirm the size of the buckle side of strap before your ordering.Features:Material: Stainless SteelColor: Silver ToneFit Strap Width: 118mm / 4.65-inchTotal Size: 17.5 x 21.3 x 6mm / 0.69 x 0.84 x 0.24-inch(L*W*H)Package Content:4 x Watch Strap.