[header] How to prevent foot blisters [title] Choose shoes that are the right size. [step] Your shoes should be neither too tight nor too loose. [substeps] A properly-fitting shoe will leave a half-inch of space between your longest toe (which is not necessarily your largest toe) and the tip of the shoe. 
Walk around in the shoes before buying them to ensure fit and comfort. A square or rounded " toe box " (the area of the shoe in which your toes go) will provide the best fit and greatest comfort.