I tried this ankle pack out last night to see what all I could fit in it. I was able to fit my iphone 7 with room to spare in the middle pocket. I ordered the large size. I also fit a few hair ties, a small flashlight and my car keys. I think this will come in handy for short trail rides on horseback or even walking the dog on a trail. The strap adjusts well and has two different tension settings. You can also use the side straps to hold a bigger flashlight or something of that sort. I feel like I will get plenty of use out of this pack.