@GB Note: This link only sells replacement straps, not smart watches, the watches are for display only This is a watch band specially designed for sports Easy-fit Connection. Easy to install or remove the watch band without tools, changing the band a snap. more freedom to adjust to wrists so that your wristband is securely fixed in the proper position. Change a Look for Your Fenix 5X. It's a silicone watchband that come with contrast color in both sides, a good replacement to show your personality. The strap comes in a variety of colors and is made of soft, durable, breathable material that is comfortable to wear and suitable for a variety of occasions and dress-ups. Wrist circumference. Compatible fenix 5X watch band, fits wrist at 6.49inches-9.25inches (165mm-235mm), please kindly measure your wrist first. For your dedicated service. Please feel free to contact us for any confusion or dissatisfaction. 1. Due to different monitor settings and different ambient light, the picture may not reflect the actual color of the item. thank you for understanding. 2. If you have any questions about the product, please contact customer service as soon as possible, you will get a satisfactory after-sales solution Please check the model number on the back of your watch before purchasing!! This one is important, it allows you to choose the size you need.