That medium was the original sized bag, then the Large was released (I own the large). Now they have medium in white as well. They will also be releasing their newest model called "Metro" early 2011- February, I believe. That's gonna be my new man purse. Here's a link to both the white commuter and metro from bikecommuters.com coverage of Interbike: http://www.bikecommuters.com/2010/09...nterbike-2010/