Baaletc Extender Band for Fitbit Flex/ 2 &amp; Fitbit Alta Fitness Tracker Wristbands - Designed for Larger Size Wrists or Ankle Wear， 14mm (Width) x 115mm (Length)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Compatible with Fitbit Flex， Fitbit Flex 2， Fitbit Alta， Alta HR fitness wristband and fit tightly </span></li><li><span class="a-list-item"> Extend your fitbit wristband from Small size to a Large or X-Large size </span></li><li><span class="a-list-item"> Wear your Fitbit wristband around ankle and get more accurate step counter </span></li><li><span class="a-list-item"> Fit adults ankle between 9" to 12" sizes， comfortable fit and no worry losing your fitbit </span></li><li><span class="a-list-item"> Package only include 1 x extender strap &amp; 2 silicone fastener ring! </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31TJcAku0cL.jpg" noproxy>