Yurbuds Armband - Women's
I have tried several fanny packs and armbands to hold my phone while I run and I was unhappy with all of them because they would not fit while my phone was in the case and they would not stay in place on my small arm. This is exactly what I wanted and the adjustable Velcro strap fits my small bicep.  It is easy to insert my phone while it's in the case. I love it and I would recommend this armband to everyone.