NWT Herschel Supply Co. Grade Mini Messenger Bag Oil Blue Crosshatch Nordstrom
Depth: 5". - Small Interior Pocket w/ Zipper. - Hard Bottom Flap that can be folded up or down for more or less structure.
Hazard 4 Tonto Concealed Carry EDC Black Mini-Messenger, No.1 US Tactical Brand
You will find that the mini shape works well when you want to travel light but stay stylish.