If you like to bring your phone with you on your runs, then the Nike Arm Band Black lets you move hands-free. Its elastic material comfortably conforms to your skin, while the Velcro closure offers an easily adjustable fit. This armband securely holds most phones in the enclosed pocket and a clear, touchscreen window lets you quickly reply to messages or skip songs without having to remove your phone altogether. 6.5 x 4 elastic/one size fits all