This model does take the iPhone and without any adapting will fit down to 29cm, however if you are handy with a needle and thread you can cut off the hook part of the velcro and sew it back on further down the strap it can be reduced further to 22cm..
It gives the minimum arm circumference as 25cm, and mine seems to be just under :(.
I bought the Sports Direct one and could just about get away with it on the smallest setting. When I started to run though I then found that I flicked between feeling that it was too loose to thinking that it was cutting my circulation off!
Once I'd got to about Week 7 and realised that I was probably in this for a while I 'invested' a whopping £15-ish in a pair of Ron Hill capri pants with a zip in the back (TK Maxx sell them). I wasn't convinced that my iPod would fit but it did, easily. And, let's just say that I get a very unladylike 'glow' about me and was worried about sweat getting in. A cheap, small food bag to pop my iPod in before I start and everything is fine now! I appreciate that this only works if you are quite happy to leave your phone untouched for the whole of the run though.
TK Max is great! That's where I got my capris too, although the pocket is tiny. I might go back and look for some of those with the bigger pocket at the back.
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