Perfect fit for: Apple iPhone 8/7(4.7INCH)iPhone X , also Fits with iPhone 4/4s/5/5c/5S/6/6S & iPod Touch 3/4/5/6 Player,Galaxy s8 s9 S7 S6and any mobile device with smaller outer size than the iPhone 8/7,this is a smart and simple sports armband with Headphone Support for All Phones. Safety:the reflective strip circled around the sreen window, unnoticeable safety strip keeps you noticeable when running in low light scenario. No Slipping& Adjustable: The armband is designed using an anti-slip material so that it stays put for comfortable movement.The lightweight feel of this armband maximizes your comfort while you wear it. Come with an additional strip which makes the armband fit the big size arms easily.The double slots design also helps to adjust the armband to fit your arms more safely.