Measurement Method: Use a ruler to measure the inner width of the buckle to determine whether your strap is 17mm, 19mm or 20mm. Please choose the size based on this measurement before purchasing. Plastic Buckle: Like the original buckle, it is made of high -hardness ABS material. Various colors can meet the needs of your straps. Premium Loop Holder: Made by high -quality silicone, skin -friendly, anti -allergies and good toughness. They can perfectly cooperate with the SWATCH strap. Easy to install: Come with installation tool. You can use the tip of the tool to remove the old buckle, and it is easy to remove it. Through the fork of the tool, you can shrink the double -hold spring rod, and then it can easily install a new buckle on the strap. What You Get: Packaging includes 1x Buckle, 2 x Loop Holders, 1 x Tool. We provide many colors. If you have different needs for colors and quantities, you can also contact us. Hijiawee will give you a satisfactory reply. Hijiawee Watch Straps Replacement Plastic Buckle and Silicone Loops for Swatch, Band Holder Keeper and Clasp for Swatch 17mm/19mm/20mm