Armband Extension Straps For The Iphone Armband & Samsung Armbands Extend Your Armband and Ensure You Don't Have An Armband That Is Too Small For Your Arms The Red Star Tec Armband Extender Strap is perfect for anyone who has an armband but they find the band on their armband is just too short for their arms . If you have an armband for your Iphone, Samsung or any other smartphone then the armband Extender could be just what you are looking for to make the most of your armband. Compatible With Most Armbands on the Market, If are looking for that elusive Large or EVEN the Extra Large Armband then consider the armband extensions from Red Star Tec The armband extender adds an extra 8 inches to the armband giving the whole armband a circumference of about 23 inches. With this universal armband extender there will be no more worries about will your armband fit around your biceps