Good analysis of why selling shoes online makes so much sense:

The next time you walk into H&M, et al, look for the “back of house,” aka the stock room. It doesn’t exist. These stores place all of their inventory on the showroom floor the second it comes in and keep no reserves in stock. Despite its appeal, this fast fashion model doesn’t translate well to footwear due to the above mentioned fulfillment and inventory management issues. Just think about the massive size and unattractive design of your local DSW, and you can quickly understand why not.