This is a TUMI PC bag. I haven't used it much since I bought it, and it has been stored at home. Size (approximate, laid flat): W: Approximately 41cm H: Approximately 32cm D: Approximately 3cm Please note that there may be slight variations due to the measurements being taken by hand. This bag is large enough to hold a laptop. I think it can be used for commuting or specifically for carrying a computer. It comes with a removable shoulder strap. It is in good condition with no noticeable stains. Stains and other imperfections are shown in the photos, but there may be minor dirt or scratches. Please understand.