I had been looking for an armband for my IPhone 4 but in addition to not being able to find one small enough for a woman's arm, I also started to think it was a bit dumb displaying a $500+ piece of equipment out in plain sight.  I prefer not to be mugged.  It was hard to tell from the picture whether or not this would be big enough to fit my phone, but in actuality, it is a little roomy.  There is plenty of space for the phone, keys, tissues, chapstick...etc but it's not bulky at all and fits very snugly under a T-shirt.  Very comfortable and moisture resistant fabric with quality stitching and enough padding that it doesn't dig in and the phone isn't jostled.  Love it!