What a great bag!, it is just a little bigger than the Lululemon belt bag type - which has been my go to. This has enough space for your wallet, phone, glass case and a few other things. I usually wear it across my back and the strap can easily be reattached to wear in the front. The zipper is also of high quality. I think this company is so thoughtful and intentional in it design as well as being socially aware. I am very happy with my new bag and am actively considering the Commuter backpack as my next purchase!