*.*.
I have a rather casual style, so I don't know if this is "pretty" lol...but I just bought it at Target to use for the same purpose.
I got it because it fits my skip hop pronto diaper changing kit plus all my stuff and there is still room for more. Right now I don't have baby stuff in it (since baby isn't here yet) and it doesn't look too bulky because of the material.
The handle goes small enough that you can carry it on a shoulder (which I prefer) as opposed to the cross-body.
http://www.target.com/p/mossimo-supply-co-washed-crossbod...