I haven't bought one of these yet (I have another style Sakroots) but did try it out at Staples - of all places.  My iphone is in an Otterbox Commuter case and it fit within this wristlet very nicely.  My wish is that the other end of the strap had a hook on it too.  I like to put these thru my belt loops instead of having my phone in my pocket when I am not carrying a purse.  These are very very well made!  Like I stated earlier, I have another style that I am currently using and like it a lot.