I carry a very tiny purse, its just big enough to hold my cell phone, keys, ID and pocket money. I cycle with my cell phone and keys in my jersey or jacket pockets, so the purse lies very flat in my carradice bag (i tuck it in the pocket on the outside of my jannd computer padded case), and then wear it at work strung over my shoulder to hip so I have my keys, ID, and cell phone handy at all times.

I have a larger purse at home, but usually I just use this when travelling. Its a great LLbean mini-messenger bag I got at their last sale. Great for holding that extra bit of stuff you need when travelling.

I have no clue what 'fashion' dictates, I like making my own fashion.