They are milled precisely to the contours of your feet thus taking up less space than would be thought, however, it is advisable to remove any existing insoles from your footwear to increase space. We also provide different orthotic styles and lengths to accommodate different styles of shoes. You may find you need a second set of orthotics of a different style for different footwear. For example, if you wear narrower court shoes/dress shoes to work but generally at home or for leisure you are in a wider, deeper shoe. During your assessment, the podiatrist will discuss your footwear and so we ask that you bring in a variety of shoes that you wear day to day.