I've taken up walking and jogging for weight loss and quickly discovered that if I wanted to go to a track, I needed somewhere to put my keys while running. Not wanting to buy, horror of horrors, a fanny pack, I settled on one of these runner's packs. I'm pleased with the quality and look of the item, and overall I do not regret the purchase.
However, I really, really, really wish "One size fits all" products would at least list the dimensions of the item. As I said, I'm walking/running for weight loss, so I hope this will fit more comfortably in time. Currently, I have to wear it very high on my chest in order to fasten it and it isn't as if that is super-comfortable. It also looks fantastically stupid, so I wear it under my clothes -- also not too comfy. I'm not blaming the company for my size, by any means, but if I could have found a measurement for the belt in the item description, I could have made a more informed purchase.
As it was, I just sort of had to cross my fingers and hope.